Chapter IV: Part 4

**_Passer domesticus domesticus_ (Linnaeus).--Burleigh and Lowery (1942:204) remarked that the House Sparrow was not "a common bird around Saltillo" although they noticed _P. d. domesticus_ regularly. They reported House Sparrows also from the Chorro del Agua and in the high mountain valley south of Diamante Pass. Miller, Friedmann, Griscom, and Moore (1957:275) recorded _P. d. domesticus_ from Sabinas. Baker captured House Sparrows in a bat net 12 mi. E San Antonio de las Alazanas, 9950 feet, on July 5, 1955. Although there are no other records, the House Sparrow is probably fairly common in the villages and towns of the State.

[**_Sturnella magna hoopesi_ Stone.--The Eastern Meadowlark is uncommon in Coahuila. The AOU Check-list Committee (1957:523) listed this subspecies of the Eastern Meadowlark from northern Coahuila.]

**_Sturnella neglecta neglecta_ Audubon.--_Specimen examined:_ one, [Female] 31098, from the Rio Grande (=17 mi. S Dryden, Terrell Co., Texas, in Coahuila), 600 ft., March 18, 1952, weight, 71.8 gms.

This subspecies of the Western Meadowlark seems to be locally common in the open country of Coahuila. Burleigh and Lowery (1942:205) found this meadowlark common "about Saltillo" where a "small series" of _S. neglecta_ was obtained. Miller, Friedmann, Griscom, and Moore (1957:295) recorded the Western Meadowlark from El Diamante on July 7. To my knowledge, no specific breeding records of this meadowlark from Coahuila exist.

**_Xanthocephalus xanthocephalus_ (Bonaparte).--_Specimen examined:_ one, [Male] 32494 (skeleton only) from Las Margaritas, August 4, 1955.

The Yellow-headed Blackbird occurs in Coahuila in migration. Miller (1955a:173) found this blackbird at Noria "in the flats immediately east of the Sierra del Carmen" on April 28, and reported also that Marsh took a male in worn breeding plumage on July 24 at Tanque de los Melones on La Bavia Ranch east of Fresno Mesa. Amadon and Phillips (1947:579) took two adult males at Las Delicias on August 11 and 15. Dickerman also saw a female 8 mi. E and 2 mi. S Americanos on May 18, 1954. Van Hoose saw a male at Torreon on July 2, 1955.

*_Agelaius phoeniceus megapotamus_ Oberholser.--_Specimens examined:_ total 5: [Male] 32124, [Female] 32126, and [Female] 32128 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 19, 1952; [Male] 32125 from 2 mi. W Jimenez, 850 ft., June 20, 1952; and [Female] 32127 from 9 mi. S, 11 mi. E Sabinas, June 14, 1952.

This subspecies of the Redwinged Blackbird is common in eastern Coahuila. There are no records of the species from western Coahuila. Burleigh and Lowery (1942:205) obtained a male at "the edge of Saltillo" on April 24. Oberholser (1919a:23) recorded _A. p. megapotamus_ from Porfirio Diaz on June 2, 5, and 6. The presence of juveniles (32126, 32128) from 12 mi. N and 12 mi. W Jimenez and (32125) from 2 mi. W Jimenez, respectively, and the dates (June 14, 19, 20) on which the University of Kansas specimens were obtained are evidence of breeding by _A. p. megapotamus_ in northeastern Coahuila.

*_Icterus spurius_ (Linnaeus).--_Specimens examined:_ total 8: [Male] [Male] 31536-31537 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 19, 1952; [Male] 31538 from 2 mi. S, 3 mi. E San Juan de Sabinas, 1160 ft., June 23, 1952; [Male] [Male] 32605-32607 from Parras, July 4, 1955; [Male] 32604 and [Female] 32603 from Hacienda San Lorenzo, July 3, 1955, weights, 19.4, 18.5 gms.

The Orchard Oriole seems to occur fairly commonly in eastern and southern Coahuila and breeds in the State. Amadon and Phillips (1947:579) reported that Orchard Orioles were common in the desert "about Las Delicias" in August and September and probably were migrants. Dickerman collected Nos. 32605-32606 along an irrigated field-edge that consisted of cottonwood and oak; he obtained Nos. 32603-32604 in an irrigated pecan orchard. The sizes of the testes (10x5 mm.; 10x5 mm.; 8x7 mm.; 8x7 mm.; 10x8 mm.) of Nos. 31536, 31537, 32605, and 32604, respectively, and the size of the largest ovum (2 mm.) of No. 32603 as well as the dates (June 19, 23; July 3, 4) on which all these specimens were collected indicate breeding by this species in the State.

*_Icterus cucullatus cucullatus_ Swainson.--_Specimens examined:_ total 2: [Male] 32123 from 2 mi. W Jimenez, 850 ft., June 21, 1952; and [Male] 32122 from 2 mi. S, 3 mi. E San Juan de Sabinas, 1160 ft., June 23, 1952.

The Hooded Oriole apparently is uncommon in Coahuila. Miller, Friedmann, Griscom, and Moore (1957:290) listed _I. c. cucullatus_ from Sabinas. The size of the testes (11x6 mm.) of No. 32122 and the dates (June 21, 23) on which Nos. 32123 and 32122 were collected as well as the juvenile male (tail, 80.5 mm.) from 2 mi. W Jimenez suggest breeding by this subspecies in Coahuila.

*_Icterus parisorum_ Bonaparte.--_Specimen examined:_ one, [Female] 32121, from 7 mi. S, 4 mi. E Bella Union, 7200 ft., June 25, 1952.

Scott's Oriole is common in Coahuila. Miller (1955a:173) found this oriole breeding in the canyons at the base of the Sierra del Carmen. Burleigh and Lowery (1942:205) found this oriole limited to the higher altitudes above 7000 feet, and took specimens at Diamante Pass and at the Chorro del Agua on April 19. Amadon and Phillips (1947:579) found Scott's Oriole "not uncommon in the arroyos near Las Delicias" and reported a juvenile "barely out of the nest and able to fly only a few feet ..." on August 15. No. 32121 had an egg in its oviduct. Dickerman saw Scott's Orioles in the Sierra del Pino on May 12, 1954, and 16 mi. E and 18 mi. N Ocampo on May 7, 1954.

**_Icterus wagleri wagleri_ Sclater.--Ridgway (1902:268) recorded _Icterus wagleri_ from Saltillo. Hellmayr (1937:122-123) referred this record of Wagler's Oriole to _I. w. wagleri_.

*_Icterus bullockii bullockii_ (Swainson).--This subspecies of Bullock's Oriole was listed as breeding by Miller, Friedmann, Griscom, and Moore (1957:282) at Monclova on May 12-19.

_Euphagus cyanocephalus_ (Wagler).--Brewer's Blackbird is a common migrant in Coahuila. Miller (1955a:174) found a few as migrants in the Sierra del Carmen on April 27. Burleigh and Lowery (1942:205) remarked that "this blackbird was characteristically a bird of the towns and villages, the scattered flocks being invariably seen feeding in the streets and near the houses." They (_loc. cit._) obtained three specimens at Diamante Valley on April 23 and remarked that the departure of these birds in spring was "extremely late."

_*Cassidix mexicanus prosopidicola_ Lowery.--_Specimens examined:_ total 3: [Female] 32893 from Parras, July 4, 1955, weight, 98.8 gms.; and [Male] [Male] 35418-35419 from Torreon, January 8, 1954.

This subspecies of Boat-tailed Grackle has been recorded from several localities in Coahuila. In southeastern Coahuila, Burleigh and Lowery (1942:205-206) noted this grackle "somewhat local in its distribution; it was found in cultivated fields about the towns and villages." These authors noted it at Saltillo, the Chorro del Agua, and "occasionally in the open valley south of Diamante Pass" and obtained specimens from "near Saltillo" and Diamante Valley. On August 18 Amadon and Phillips (1947:579) found _C. m. prosopidicola_ at Las Delicias where "a fledged young was noticed begging for food...." Lowery (1938:4) recorded one specimen of _C. m. prosopidicola_ from Monclova. Findley saw Boat-tailed Grackles 2 mi. W Jimenez on June 19, 1952, and 2 mi. S and 11 mi. E Nava on June 15, 1952.

The distribution and intergradation of Boat-tailed Grackles in Coahuila is presently poorly understood. _C. m. prosopidicola_ from southeastern Coahuila may approach _C. m. mexicanus_, and there is probable intergradation of _prosopidicola_ with _monsoni_ in northwestern Coahuila (Phillips, 1950:78).

_Molothrus ater ater_ (Boddaert).--_Specimen examined:_ one, [Female] 31513, from 21 mi. S, 11 mi. E Australia, 4400 ft., May 3, 1954, measurements: wing, 102 mm.; tail, 64 mm.; tarsus, 26 mm.; culmen, 17 mm.

This subspecies of the Brown-headed Cowbird is uncommon in Coahuila. Amadon and Phillips (1947:579) took an adult male and a juvenile female _M. a. ater_ at Las Delicias on August 15, both of which were considered early migrants. Dickerman obtained No. 31513 from a flock of eight cowbirds. Although the measurements of this specimen agree equally well with those of _M. a. ater_ and _M. a. artemisiae_ (Grinnell, 1909:275-281), the shape of the bill most closely resembles that of _ater_. Grinnell (1909:278) said that "_ater_ has a tumid bill, broad and high at [the] base with [a] conspicuously arched culmen" whereas "_artemisiae_ has a longer and relatively much slenderer bill, vertically shallow at [the] base and laterally compressed, with the culmen in its greater portion straight or even slightly depressed." The size of the ovary (8x4 mm.) of No. 31513 and the date (May 3) on which it was obtained suggest that this individual was a late migrant, still south of the breeding range of _M. a. ater_.

_Molothrus ater artemisiae_ Grinnell.--This subspecies of the Brown-headed Cowbird is an uncommon migrant in Coahuila. Amadon and Phillips (1947:579) obtained, at Las Delicias, a juvenile male on August 15 and an adult male on August 17.

*_Molothrus ater obscurus_ (Gmelin).--_Specimens examined:_ total 18: [Male] [Male] 32112-32115 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 18 and 19, 1952; [Male] [Male] 32108-32111, [Male] 32116, and [Female] [Female] 32117-32120 from 2 mi. W Jimenez, 850 ft., June 20, 1952; [Female] 32491 from Las Margaritas, August 4, 1955; [Male] 31511 and [Female] 31510 from 16 mi. E, 18 mi. N Ocampo, May 8 and 7, 1952; and [Male] [Male] 35409-35410 (skeletons only) from 4 mi. N San Isidro, May 11, 1954.

This subspecies of the Brown-headed Cowbird is common in Coahuila and breeds there. Amadon and Phillips (1947:579) suggested that _M. a. obscurus_ breeds at Las Delicias. Burleigh and Lowery (1942:206) saw the Brown-headed Cowbird in "small numbers on the outskirts of Saltillo...."

Measurements of the adult males that I have examined are: wing, 101.1 mm. (97-106); tail, 66.5 mm. (62-69); tarsus, 25.6 mm. (24.5-28); culmen, 17.3 mm. (16-18.5). Measurements of the adult females that I have examined are: wing, 92.3 mm. (90-97); tail, 60.1 mm. (56.5-62.5); tarsus, 23.5 mm. (22.5-24); culmen, 14.4 mm. (14-15). The sizes of the testes of three of the males (6-7 mm. long) and of the largest ova of four of the females (6-9 mm. in diameter) indicate breeding by this subspecies in Coahuila, as does the small size of one of the juvenile males (tail, 33.5 mm. long).

_Piranga ludoviciana_ (Wilson).--In Coahuila the Western Tanager occurs fairly commonly as a migrant. There are no records of it breeding in the State. Miller (1955a:174) remarked that Marsh took a migrant Western Tanager at Jardin del Sur in the Sierra del Carmen on September 7. Amadon and Phillips (1947:579) took an adult male Western Tanager at Las Delicias on August 12. Miller, Friedmann, Griscom, and Moore (1957:305) also recorded this tanager from 12 mi. W Saltillo. Dickerman saw Western Tanagers in the Sierra del Pino on May 12, 1954, and 16 mi. E and 18 mi. N Ocampo on May 7, 1954.

*_Piranga flava dextra_ Bangs.--_Specimen examined:_ one, [Male] 31526, from Sierra del Pino (=5 mi. S, 3 mi. W Acebuches), May 12, 1954, weight, 41 gms.

Miller (1955a:174) found this subspecies of the Hepatic Tanager "in the pine-oak belt at 7000 feet on April 12 [in the Sierra del Carmen], when a male was seen and a female taken." No. 31526 was with a female when taken; this male was not fat and its testes were not enlarged. The size of the wing (105.5 mm.) of No. 31526 represents the extreme maximum in this subspecies.

_Piranga flava hepatica_ (Swainson).--Miller, Friedmann, Griscom, and Moore (1957:303) stated that _P. f. hepatica_ is found in northwestern and central Arizona and southwestern New Mexico south into the highlands of Mexico, west of the Sierra Madre Oriental, to Oaxaca and in winter and migration extends eastward and south to Chiapas. These authors remarked also that _P. f. dextra_ occurs in the mountains east of the continental divide in New Mexico and western Texas south through eastern Mexico to Chiapas. Specimens of the Hepatic Tanager from Coahuila in winter might well be either _P. f. hepatic_ or _P. f. dextra_. Miller, Friedmann, Griscom, and Moore (_loc. cit._) recorded migrants of _P. f. hepatica_ from the Sierra de Guadalupe on April 24-27.

*_Piranga rubra rubra_ (Linnaeus).--_Specimens examined:_ total 6: [Male] 32129, [Male] 32132, and [Female] 32133 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 18 and 19, 1952; [Male] 32130 from 2 mi. W Jimenez, 850 ft., June 20, 1952; and [Male] 32131 and [Female] 32134 from 2 mi. S, 11 mi. E Nava, June 15, 1952.

This Summer Tanager occurs in northeastern Coahuila. The specimens from 12 mi. N and 12 mi. W Jimenez, 2 mi. W Jimenez, and 2 mi. S and 11 mi. E Nava are typical representatives of _P. r. rubra_. The large testes (12 mm.) of No. 32129 and the well-developed brood patch of No. 32134 are evidence of breeding by this subspecies in the State. Heretofore this subspecies has not been recorded from Coahuila.

*_Piranga rubra cooperi_ Ridgway.--_Specimens examined:_ total 4: [Male] [Male] 32828-32829, [Male] 32831, and [Female] 32830 from Parras, July 4, 1955.

This subspecies of Summer Tanager seems to occur throughout Coahuila except in the northeastern section of the State. Miller, Friedmann, Griscom, and Moore (1957:302) listed _P. r. cooperi_ from Sabinas and Sierra de Guadalupe. Miller (1955a:174) saw a Summer Tanager in a canyon in the Serranias de Burros, about 40 miles east of the Sierra del Carmen on April 28. Although there are no other records of _P. r. cooperi_ from northwestern Coahuila, Van Tyne and Sutton (1937:96) recorded this tanager as a common nesting species in Brewster County, Texas, in cottonwood, mesquite, or willow trees. I suspect that _P. r. cooperi_ is a common nesting bird in northwestern Coahuila as well.

Nos. 32828-32831 approach _P. r. rubra_. The measurements of No. 32829 are: wing, 98 mm.; tail, 80 mm.; the measurements of No. 32831 are: wing, 98 mm.; tail, 79 mm. The specimens of _P. r. cooperi_ from Parras are somewhat small and seemingly approach _P. r. rubra_. The sizes of the testes (8x5 mm.; 9x5 mm.) of Nos. 32829 and 32831, respectively, and the size of the largest ovum (4x4 mm.) of No. 32830 indicate breeding by this subspecies in southern Coahuila, as does the presence of No. 32828, a juvenile male.

*_Richmondena cardinalis canicaudus_ (Chapman).--_Specimens examined:_ total 3: [Male] 31099 from 1 mi. N Boquillas, 700 ft., March 8, 1952, weight, 45.3 gms.; [Male] 32135 from 2 mi. W Jimenez, 850 ft., June 20, 1952; and [Male] 32136 from 2 mi. S, 3 mi. E San Juan de Sabinas, June 22, 1952.

In Coahuila the Cardinal is common. Miller (1955a:174) found it singing in the Boquillas drainage of the Sierra del Carmen at 4800 feet, and gave evidence that the Cardinal breeds there. Sutton and Burleigh (1939a:43) found the species to be common in the low country "east of Saltillo." Hellmayr (1938:69) recorded _R. c. canicaudus_ from Sabinas. The sizes of the testes (9 mm.; 7x4 mm.) of Nos. 32135-32136 indicate breeding by this subspecies in northeastern Coahuila.

*_Pyrrhuloxia sinuata sinuata_ (Bonaparte).--_Specimens examined:_ total 4: [Male] 31100 from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 4, 1952, weight, 37.3 gms.; [Male] 32137 from 5 mi. N, 19 mi. W Cuatro Cienegas, 3250 ft., July 5, 1952; [Male] 35403 (skeleton only) from San Marcos, May 5, 1954; and [Male] 30234 from 3 mi. SE Torreon, 3800 ft., January 12, 1951.

In Coahuila, the Pyrrhuloxia is common. Hellmayr (1938:76) listed it from Sabinas. Ridgway (1901:628) recorded _P. s. texana_ (=_sinuata_) from La Ventura. Burleigh and Lowery (1942:206) found the species "only in the open desert country west of Saltillo where, on April 22, several pairs were seen in a small arroyo." Amadon and Phillips (1947:579) took an immature _P. s. sinuata_ at Las Delicias; Sutton and Burleigh (1939a:43-44) found this subspecies fairly common in the San Pedro district on January 29 and 30. Miller, Friedmann, Griscom, and Moore (1957:330) recorded breeding by _P. s. sinuata_ at Hipolito on July 2. The size of the testes (8 mm.) of No. 32137 indicates breeding in central Coahuila.

*_Pheucticus melanocephalus melanocephalus_ (Swainson).--_Specimen examined:_ one, [Male] 31664, from Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 7500 ft., April 30, 1953, measurements: wing, 105.5 mm.; tail, 78 mm.; culmen, 19 mm.; weight, 48 gms.

Miller (1955a:174) reported that the Black-headed Grosbeak first appeared in the Sierra del Carmen on April 13 and was soon seen patrolling territories. He remarked that these specimens from the Sierra del Carmen conformed adequately with the rather poorly differentiated race _P. m. melanocephalus_ and stated that Marsh took an immature male at Jardin del Sur on September 7. Oberholser (1919b:416) listed _Hedymeles melanocephalus papago_ (=_P. m. melanocephalus_) from Sierra Guadalupe on April 27. Dickerman saw Black-headed Grosbeaks in the Sierra del Pino on May 12, 1954, and 16 mi. E and 18 mi. N Ocampo on May 7, 1954. The size of No. 31664 represents the characters of _P. m. melanocephalus_ as presented by Oberholser (1919b:413). No specimen of _P. m. melanocephalus_ from Coahuila, to my knowledge, approaches _P. m. maculatus_. The size of the testes (7x5 mm.) of No. 31664 suggests breeding by this subspecies in the Sierra Guadalupe.

*_Guiraca caerulea interfusa_ Dwight and Griscom.--_Specimens examined:_ total 2: [Male] 32138 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 18, 1952; and [Female] 32139 from 2 mi. W Jimenez, 850 ft., June 21, 1952.

Burleigh and Lowery (1942:206) recorded this Blue Grosbeak from "about twenty miles west of Saltillo" on April 22. Miller (1955a:174) stated that Marsh obtained a male _G. c. interfusa_ at Vivoras Spring on August 3. Miller, Friedmann, Griscom, and Moore (1957:334) remarked that the Blue Grosbeak breeds in the northern and eastern sections and reported _G. c. interfusa_ from Hipolito on July 2. Amadon and Phillips (1947:580) reported examining material from Sabinas referable to _G. c. interfusa_. Dickerman saw Blue Grosbeaks 4 mi. N San Isidro on May 10, 1954. Findley saw Blue Grosbeaks 4 mi. W Jimenez on June 19, 1952, and 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952. Nos. 32138-32139 are typical representatives of _G. c. interfusa_. The size of the testes (12 mm.) of No. 32138, the size of the largest ovum (2 mm.) of No. 32139, and the dates (June 18, 21) on which they were collected are evidence of breeding by this subspecies.

**_Guiraca caerulea eurhyncha_ Coues.--Amadon and Phillips (1947:580) obtained an adult male of this Blue Grosbeak from Las Delicias on August 12. This subspecies, according to Miller, Friedmann, Griscom, and Moore (1957:334), is resident at middle and lower elevations through most of central and southern Mexico. Except for the occurrence of intergrades of _G. c. interfusa_, _caerulea_, and _eurhyncha_ in southern Nuevo Leon and Tamaulipas (Miller, Friedmann, Griscom, and Moore, 1957:335), the record from Las Delicias represents the northern limit of the range of the subspecies _eurhyncha_.

*_Passerina cyanea_ (Linnaeus).--_Specimen examined:_ one, [Male] 31544, from San Marcos, May 5, 1954.

The Indigo Bunting is rare in Coahuila. Van Hoose (1955:303) reported that No. 31544 seems to provide the first record of the species in the State. The Indigo Bunting is a summer resident in southwestern Oklahoma and southeastern Texas (Miller, Friedmann, Griscom, and Moore, 1957:336). No. 31544 seemingly represents a large extension in the summer range of the Indigo Bunting. Van Hoose (_loc. cit._) stated that No. 31544 was observed chasing another male, and the pursuer in turn was followed by a female; he thought that the territorial behavior of this bird suggested breeding.

*_Passerina versicolor versicolor_ (Bonaparte).--_Specimens examined:_ total 2: [Male] 35414 from 6 mi. N, 2 mi. W Castillon, 3750 ft., June 30, 1953, weight, 8 gms.; and [Male] 35415 from 5 mi. S Castillon, 4150 ft., June 28, 1953.

Although the Varied Bunting has been recorded only from northwestern Coahuila, I suspect that this bird is locally common throughout most of the State. Miller (1955a:174) stated that the habitat of this species consisted of catclaw-covered bottom lands at the base of the Sierra del Carmen at 4700 feet. Miller's records indicate incipient breeding by _P. v. versicolor_ in the Sierra del Carmen on April 26. The size of the testes (11 mm.) of No. 35415 and the dates (June 28, 30) on which Nos. 35414-35415 were collected are strong evidence of breeding by the Varied Bunting 6 mi. N and 2 mi. W Castillon and 5 mi. S Castillon.

*_Passerina ciris pallidior_ Mearns.--_Specimens examined:_ total 6: [Male] 32141 and [Female] 32142 from 2 mi. S, 11 mi. E Nava, 810 ft., June 15 and 16, 1952; [Male] 35416 from 6 mi. N, 2 mi. W Castillon, 3750 ft., June 29, 1953, weight, 15 gms.; [Male] 32140 from 2 mi. S, 3 mi. E San Juan de Sabinas, June 22, 1952; [Male] 31547 from 16 mi. N, 14 mi. E Ocampo, May 10, 1954, weight, 16 gms.; and [Male] 31546 from San Marcos, May 5, 1954.

The Painted Bunting is a common summer resident in Coahuila. Marsh and Stevenson (1938:287) wrote that Painted Buntings were common in summer in the foothills of the Sierra del Carmen, and they took a male at Piedra Blanca on July 25 and a female at Jardin del Sur on September 1. Amadon and Phillips (1947:580) remarked that two immature Painted Buntings, "apparently migrants, were taken at Las Delicias on August 10 and 11." Miller, Friedmann, Griscom, and Moore (1957:339) recorded breeding by _P. c. pallidior_ at Hipolito, 4200 feet, on July 1. Findley saw Painted Buntings 2 mi. S and 11 mi. E Nava on June 15, 1952. Dickerman saw Painted Buntings 4 mi. N San Isidro on May 10, 1954. Hardy saw Painted Buntings at Parras on July 4, 1955.

All the University of Kansas specimens are typical of the larger subspecies _pallidior_. The dates (May 5, 10; June 15, 16, 22, 29) on which these specimens were collected, the sizes of the testes (9x6 mm.; 6x5 mm.; 7x3 mm.) of Nos. 32140, 31547, and 31546, respectively, and the size of the largest ovum (2.5 mm.) of No. 32142 indicate breeding by _P. c. pallidior_ in Coahuila.

_Carpodacus cassinii_ Baird.--Cassin's Finch is an uncommon winter migrant in Coahuila. Miller, Friedmann, Griscom, and Moore (1957:314) listed _C. cassinii_ from Sierra Guadalupe.

*_Carpodacus mexicanus potosinus_ Griscom.--_Specimens examined:_ total 8: [Male] 35417 from 13 mi. S, 5 mi. W Castillon, 4000 ft., June 28, 1953, testes, 6 mm., weight, 19 gms.; [Female] 35411 (skeleton only) from Sierra del Pino (=5 mi. W, 3 mi. S Acebuches), 6200 ft., May 14, 1954; [Male] 32145 from 5 mi. N, 19 mi. W Cuatro Cienegas, 3250 ft., July 5, 1952; [Male] 32144 and [Female] 32147 from 3 mi. S, 3 mi. E Bella Union, 6750 ft., June 27, 1952, [Male] gonads, 7 mm.; [Male] 32143 and [Female] 32146 from 7 mi. S, 4 mi. E Bella Union, 7200 ft., June 24, 1952; and [Male] 31675 from the west foot of Pico de Jimulco, 5000 ft., April 4, 1953, weight, 20 gms.

The House Finch is common in Coahuila. Miller (1955a:174) reported a sparse population of this species in the foothills adjoining Boquillas Canyon at 4800 feet of the Sierra del Carmen and observed young just out of the nest on April 25. He remarked also that specimens of the House Finch from the Sierra del Carmen seem to show no intergradation toward _frontalis_. Burleigh and Lowery (1942:206) noted _C. m. potosinus_ at "Saltillo, in the desert country west of there, at the Chorro del Agua, and in the open valley south of Diamante Pass." Miller, Friedmann, Griscom, and Moore (1957:316) listed breeding by _C. m. potosinus_ at El Diamante on July 6. Dickerman also saw the House Finch at San Marcos on May 4, 1954, and Hardy saw it at Parras on July 4, 1955. No. 32147 had a distinct brood patch; the largest ovum of No. 32146 was 7 mm. in diameter. No. 32145 was a juvenile male.

The University of Kansas specimens agree well with descriptions of _C. m. potosinus_ as given by Moore (1939:195). No approach toward _C. m. frontalis_, _centralis_, or _nigrescens_ is exhibited by any of these specimens. No. 31675, from Pico de Jimulco in southwestern Coahuila, is paler above and below than any other specimens of _C. m. potosinus_. Also the crown of No. 31675 is suffused with more red than in typical representatives of _C. m. potosinus_.

**_Spinus pinus pinus_ (Wilson).--_Specimen examined:_ one, sex ? 33219 (skeleton only) from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955.

On April 5, 7, and 21, Miller (1955a:175) recorded winter visitant or vagrant flocks of Pine Siskins in the Sierra del Carmen. Miller, Friedmann, Griscom, and Moore (1957:318) listed _S. p. pinus_ south to Sierra Guadalupe. Dickerman saw Pine Siskins 13 mi. E San Antonio de las Alazanas on April 10, 1954.

_Spinus pinus macropterus_ (Bonaparte).--Miller, Friedmann, Griscom, and Moore (1957:319) recorded a vagrant _S. p. macropterus_ from 50 mi. S Monclova, 2850 feet, on November 9.

_Spinus tristis pallidus_ Mearns.--_Specimen examined:_ one, [Female] 31101, from Fortin (=33 mi. N, 8 mi. W San Geronimo), 3300 ft., March 28, 1952, weight, 11.5 gms.

The American Goldfinch is an uncommon migrant or winter visitant in Coahuila. Hellmayr (1938:296) recorded _S. t. pallidus_ from Sabinas. Fortin and Sabinas are the only places in Coahuila where _S. t. pallidus_ has been collected. No. 31101 is a typical representative of _S. t. pallidus_.

**_Spinus psaltria psaltria_ (Say).--_Specimens examined:_ total 7: [Male] [Male] 32148-32149 and [Female] 32151 from 12 mi. N, 12 mi. W Jimenez, 850 ft., June 19, 1952; [Male] 32150 from 2 mi. W Jimenez, June 20, 1952; [Male] 33220 (skeleton only) from Parras, July 4, 1955; and [Male] 32939 and [Female] 32940 from Mesa de las Tablas, July 7, 1955, weights, 9.5, 11 gms.

In Coahuila, the Lesser Goldfinch seems to be common. Although Miller (1955a:175) did not find it in the Sierra del Carmen, he reported that Marsh took a specimen on August 22 in Chuperosa Canyon that was "presumed to" be _S. p. psaltria_. Burleigh and Lowery (1942:206) observed the Lesser Goldfinch "on the outskirts of Saltillo in an orchard on April 20."

Nos. 32148-32151 and 32940 were typical for the subspecies _psaltria_. A partial albino (32939), which was obtained from a pine-oak-wheat field edge, has upper parts that lack the black coloring of typical representatives of _S. p. psaltria_. Instead the crown and back of No. 32939 is yellow, resembling the color of its underparts, the wing coverts are white, and its primaries are black with white edgings.

*_Atlapetes pileatus dilutus_ Ridgway.--_Specimens examined:_ total 2: [Male] 32942 and [Female] 32943 from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955.

The Rufous-capped Atlapetes occurs uncommonly in southeastern Coahuila. The male and female _A. p. dilutus_ from 13 mi. E San Antonio de las Alazanas represent the first records of occurrence of this subspecies in the State. The smaller size, grayer upper parts, and pale yellow color of the underparts of Nos. 32942-32943 characterize the subspecies _dilutus_. The size of the testes (7x6 mm.) of No. 32942 and the date (July 6) on which both specimens were collected indicate breeding by this species in Coahuila.

*_Arremonops rufivirgata rufivirgata_ (Lawrence).--_Specimens examined:_ total 2: [Male] 32152 and [Female] 32153 from 2 mi. S, 3 mi. E San Juan de Sabinas, June 22 and 23, 1952.

The Olive Sparrow is uncommon in Coahuila. Miller, Friedmann, Griscom, and Moore (1957:349) listed _A. r. rufivirgata_ from Sabinas on February 10. Sabinas and southeast of San Juan de Sabinas seem to be the only localities in Coahuila where the Olive Sparrow has been collected and also are at the westernmost extremity of range of this species. The size of the testes (9x7 mm.) of No. 32152 and the dates of collection indicate breeding by the Olive Sparrow in Coahuila.

_Chlorura chlorura_ (Audubon).--_Specimen examined:_ one, [Male] 30238, from 1 mi. N San Lorenzo, 4200 ft., February 5, 1951.

The Green-tailed Towhee is a common migrant and winter visitant in Coahuila; the species has been found at several localities. Miller (1955a:175) noted several migrants "each day in the last week of April ... at the mouth of Boquillas Canyon" of the Sierra del Carmen. Burleigh and Lowery (1942:207) noted the species "in an arroyo in the open desert country about twenty miles west of Saltillo on April 22." Miller, Friedmann, Griscom, and Moore (1957:351) listed the Green-tailed Towhee from 12 mi. W Saltillo on September 28 and from Sabinas.

*_Piplio erythrophthalmus gaigei_ Van Tyne and Sutton.--_Specimens examined:_ total 3: [Female] 31102 from Fortin (=33 mi. N, 8 mi. W San Geronimo), 3300 ft., March 28, 1952, weight, 38.8 gms.; [Male] 35412 (skeleton only) from Sierra del Pino (=5 mi. W, 3 mi. S Acebuches), 6200 ft., May 15, 1954, testes enlarged, weight, 34 gms.; and [Male] 31593 from 17 mi. S Ocampo, 5300 ft., April 7, 1954, weight, 38 gms.

The Rufous-sided Towhee is locally common in Coahuila; _P. e. gaigei_ is present in northern Coahuila. Miller (1955a:175) remarked that "between 6800 and 7500 feet these towhees were sparsely distributed in areas of scattered low ceanothus and hawthorne, chiefly in canyon bottoms, but also on slopes where ceanothus was intermingled with downed timber and young pines." He (_loc. cit._) indicated that the adult obtained by Marsh from Vivoras Canyon on August 25 was _P. e. gaigei_ rather than _P. maculatus montanus_ (see also Sibley, 1950:127). Dickerman saw Rufous-sided Towhees in the Sierra de la Madera on December 13, 1953. I have referred Nos. 31102 and 31593 to _gaigei_ although both are close to _orientalis_. The size of the testes (14x8 mm.) of No. 31593 suggests breeding.

*_Piplio erythrophthalmus orientalis_ Sibley.--_Specimens examined:_ total 3: [Male] 32154 from 7 mi. S, 4 mi. E Bella Union, 7200 ft., June 25, 1952; [Male] 33223 (skeleton only) from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955; and [Male] 31630 from Mesa de Tablas, 8600 ft., January 15, 1954, weight, 46 gms.

This subspecies of the Rufous-sided Towhee occurs in southeastern Coahuila. Burleigh and Lowery (1942:207) stated that it "was limited in its distribution to the mountain sides ... [and was] noted in the arroyos at the base of the mountains and from there up to about 8,000 feet." These authors identified their specimens from Diamante Pass and from Saltillo as _Pipilo maculatus gaigei_. Sibley (1950:129) reidentified them, as well as a series from Sierra de Guadalupe, as _P. e. orientalis_. The size of the testes (12x7 mm.) of No. 32154 as well as the date (June 25) on which it was obtained suggests breeding by the Rufous-sided Towhee in southeastern Coahuila.

*_Pipilo fuscus potosinus_ Ridgway.--_Specimens examined:_ total 3: [Male] 32155 from 7 mi. S, 4 mi. E Bella Union, 7200 ft., June 25, 1952; [Male] 31676 from the west foot of Pico de Jimulco, 5000 ft., April 5, 1953, weight, 45 gms.; and sex ? 29560 from 7 mi. S, 1 mi. E Gomez Farias, 6500 ft., November 19, 1949, weight, 46.5 gms.

The subspecies _potosinus_ has been recorded from several localities in Coahuila. Davis (1951:70) listed the following localities in the State from which _P. f. potosinus_ has been collected: Muralla, San Lazaro Mountains, 50 mi. S Monclova, 2850 ft., Saltillo; Saltillo (Chorro de Agua); 19 mi. W Saltillo; Cresta Blanca, 12 mi. W Saltillo, 5500 ft.; Diamante Pass, 11 mi. S Saltillo, 6000-8000 ft.; and Carneros. Miller, Friedmann, Griscom, and Moore (1957:358) recorded a "small juvenile" from El Diamante on July 5. Sutton and Burleigh (1939a:45) recorded _P. f. texanus_ from Diamante Pass on March 6. I suspect that Davis (_op. cit._) reidentified the specimen concerned from Diamante Pass as _P. f. potosinus_. Burleigh and Lowery (1942:207) indicated that _P. f. potosinus_ "was fairly common and of general distribution in the area, occurring both on the arid plateau about Saltillo and on the mountain sides up to an elevation of about 8,000 feet." Nos. 32155, 31676, and 29560 are typical for _P. f. potosinus_. The size of the testes (14x7 mm.) of No. 32155 suggests breeding by the Brown Towhee in southeastern Coahuila.

*_Pipilo fuscus texanus_ van Rossem.--_Specimen examined:_ one, [Female] 31103, from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 5, 1952, weight, 46.9 gms.

This subspecies of the Brown Towhee occurs in northwestern Coahuila south through the Sierra del Carmen. Miller (1955a:176) reported that his series of Brown Towhees from the Sierra del Carmen agreed satisfactorily with _texanus_ although revealing some sign of intergradation with _potosinus_. Davis (1951:70) thought that _P. f. potosinus_ is present in northern as well as southern Coahuila. Miller (1955a:176), however, remarked that _P. f. texanus_ is more characteristic of the population of Brown Towhees of northwestern Coahuila. He indicated that a single juvenile taken by Marsh on August 28 from Jardin del Sur and allocated to _P. f. potosinus_ by Davis probably is _P. f. texanus_.

_Calamospiza melanocorys_ Stejneger.--_Specimen examined:_ one, [Male] 30239, from 10 mi. E Torreon, 3700 ft., January 9, 1951.

The Lark Bunting is an uncommon winter visitant in Coahuila. Other than the present specimen, the only record of the Lark Bunting in Coahuila is that of Burleigh and Lowery (1942:207), who reported a small flock of this species from which several specimens were collected "on April 20 in a field on the edge of Saltillo."

_Passerculus sandwichensis oblitus_ Peters and Griscom.--Miller, Friedmann, Griscom, and Moore (1957:364) recorded _P. s. oblitus_ from Sabinas on February 25 and March 18 and 24. These records represent sparse winter visitants to Coahuila.

_Passerculus sandwichensis brooksi_ Bishop.--Burleigh and Lowery (1942:208) recorded _P. s. brooksi_ from Diamante Pass in April; Miller, Friedmann, Griscom, and Moore (1957:363) remarked that this specimen is perhaps best regarded as a variant of one of the races normally wintering in this area.

_Passerculus sandwichensis anthinus_ Bonaparte.--_Specimens examined:_ total 3: [Male] 31104 from 10 mi. E Hacienda La Mariposa, 2000 ft., March 30, 1952, weight 15 gms.; [Female] 31105 from 8 mi. N, 4 mi. W Muzquiz, 1800 ft., April 1, 1952, weight, 19.0 gms.; and [Female] 31594 from 17 mi. S Ocampo, 5300 ft., April 7, 1954, weight, 16 gms.

Burleigh and Lowery (1942:208) recorded _P. s. anthinus_ from Diamante Pass. This subspecies is not uncommon in Coahuila. The University of Kansas specimens showed no indication of breeding.

_Passerculus sandwichensis nevadensis_ Grinnell.--This subspecies of the Savannah Sparrow is uncommon in Coahuila; Hellmayr (1938:490) listed one specimen from Sabinas.

_Passerculus sandwichensis brunnescens_ (Butler).--Burleigh and Lowery (1942:208) recorded this subspecies of the Savannah Sparrow from Diamante Pass in April.

_Ammodramus savannarum perpallidus_ (Coues).--_Specimen examined:_ one, [Female] 31562, from 3 mi. N, 4 mi. E San Francisco (=25 mi. N Ocampo), 4850 ft., May 16, 1954, weight, 15 gms.

The Grasshopper Sparrow is an uncommon spring and possibly fall migrant in Coahuila. Miller, Friedmann, Griscom, and Moore (1957:367) recorded _A. s. perpallidus_ from Sabinas on March 12. No. 31562, which was obtained in a yucca and acacia association, had little fat.

_Ammodramus bairdii_ (Audubon).--Miller, Friedmann, Griscom, and Moore (1957:368) remarked that Baird's Sparrow is a rare winter visitant to the northern states of Mexico and recorded _A. bairdii_ from Saltillo on May 8.

_Pooecetes gramineus confinis_ Baird.--The Vesper Sparrow seems to be an uncommon winter visitant in Coahuila. Miller (1955a:176) found _P. g. confinis_ "on two occasions in the grass of the dry cienega at the head of Corte Madera Canyon at 7500 feet" on April 9 and 14 in the Sierra del Carmen. In April, Burleigh and Lowery (1942:208) found _P. g. confinis_ only in Diamante Valley where this sparrow "appeared to be quite uncommon." Sutton and Burleigh (1939a:45) took a male _P. g. confinis_ at San Pedro on January 29.

*_Chondestes grammacus strigatus_ Swainson.--_Specimen examined:_ one, [Male] 32156, from 8 mi. N, 2 mi. W Piedras Negras, June 18, 1952.

The Lark Sparrow is not uncommon in Coahuila. Miller (1955a:176) saw one male, "apparently on a breeding territory, on April 27 in an open, rather barren desert flat adjoining the lower part of Boquillas wash at 4600 feet." He reported that Marsh took a young of the year, still largely in juvenile plumage, on September 6 in the Sierra del Carmen. Amadon and Phillips (1947:580) remarked that Lark Sparrows were common "about Las Delicias" after August 18. Findley saw Lark Sparrows 2 mi. W Jimenez on June 19, 1952, and 2 mi. S and 11 mi. E Nava on June 15, 1952. Dickerman saw Lark Sparrows at San Marcos on May 4, 1954. The pale and narrowly streaked upperparts of No. 32156 are typical for _C. g. strigatus_. The size of the testes (9x4 mm.) of No. 32156 and the date (June 18) on which it was obtained suggest breeding by the Lark Sparrow in northeastern Coahuila.

*_Aimophila ruficeps tenuirostris_ Burleigh and Lowery.--This subspecies of the Rufous-crowned Sparrow is resident in the northern part of Coahuila. Miller (1955a:176) remarked that the species "ranged up to 7000 feet on open south-facing slopes within the oak belt" of the Sierra del Carmen. Specimens collected by him showed no approach to _boucardi_ of southern Mexico and seem to be closest to _tenuirostris_. Miller referred the specimen that Marsh and Stevenson (1938:287) took on August 22 in Chuperosa Canyon to _tenuirostris_ rather than _boucardi_. Miller, Friedmann, Griscom, and Moore (1957:376) listed _A. r. tenuirostris_ from 50 mi. S Monclova on November 8 and 10.

*_Aimophila ruficeps boucardi_ (Sclater).--This subspecies of the Rufous-crowned Sparrow is common in southern Coahuila. Burleigh and Lowery (1942:208) indicated that _A. r. boucardi_ was common throughout the mountainous areas and to some extent in the arroyos of the open desert country of southeastern Coahuila. Sutton and Burleigh (1939a:46) took a female _A. r. boucardi_ "near Diamante Pass." Ridgway (1901:252) listed _A. r. boucardi_ from Carneros. _A. r. tenuirostris_ and _boucardi_ seem to intergrade in central and even southern Coahuila. Miller, Friedmann, Griscom, and Moore (1957:376) recorded intermediate populations of the Rufous-crowned Sparrow from 12 mi. W Saltillo.

*_Aimophila cassinii_ (Woodhouse).--_Specimens examined:_ total 2: [Male] 32157 from 9 mi. S, 11 mi. E Sabinas, June 14, 1952; and [Male] 32158 from 18 mi. S, 14 mi. E Tanque Alvarez, 4000 ft., July 6, 1952.

Cassin's Sparrow seems to be common in Coahuila. The AOU Check-list Committee (1957:603) listed _A. cassinii_ from 10 mi. E Saltillo. Miller, Friedmann, Griscom, and Moore (1957:378-379) recorded Cassin's Sparrow from Sabinas, on April 25; from 25 mi. SW Monclova, on November 20; from 12 mi. W Saltillo, on September 28; and from 10 mi. NE Saltillo, on July 3. These authors stated that Cassin's Sparrow was breeding 10 mi. NE Saltillo. The sizes of the testes (5x3 mm.; 7x5 mm.) of Nos. 32157-32158, respectively, and the dates (June 14, July 6) on which they were obtained are additional evidence of breeding by Cassin's Sparrow in Coahuila.

*_Amphispiza bilineata bilineata_ (Cassin).--_Specimens examined:_ total 5: [Male] 32159 and [Female] 32163 from 2 mi. W Jimenez, 850 ft., June 20, 1952; [Male] 32160 from 8 mi. N, 2 mi. W Piedras Negras, June 18, 1952; [Male] 32161 and sex ? 32162 from 5 mi. N, 19 mi. W Cuatro Cienegas, 3250 ft., July 5, 1952.

The Black-throated Sparrow is common in Coahuila. Typical representatives of _A. b. bilineata_ occur in eastern Coahuila. The center of the State is occupied by intergrades between _A. b. bilineata_, _opuntia_, and _grisea_. Miller, Friedmann, Griscom, and Moore (1957:381) reported _A. b. bilineata_ from the "Saltillo area." Hellmayr (1938:539) recorded _A. b. bilineata_ from Sabinas. The sizes (13, 14 mm.) of the white spot on the lateral tail feathers of Nos. 32163 and 32160, respectively, suggest _A. b. bilineata_. The short wing (61-64.5 mm.) and the lighter and browner color of the backs of Nos. 32163, 32160, and 32161 are suggestive of _A. b. bilineata_. Nevertheless, the size (8 mm.) of the white spot on the lateral tail feather of No. 32161 indicates intergradation with _A. b. opuntia_.

The sizes of the testes (6x4 mm.; 8 mm.) of Nos. 32160 and 32161, the size of the largest ovum (2 mm. in diameter) of No. 32163, and the presence of the juveniles from 2 mi. W Jimenez and 5 mi. N and 19 mi. W Cuatro Cienegas indicate breeding by _A. b. bilineata_ in Coahuila.

*_Amphispiza bilineata opuntia_ Burleigh and Lowery.--_Specimens examined:_ total 2: [Female] 31106 from 10 mi. S, 5 mi. E Boquillas, 1500 ft., March 3, 1952; weight, 12.3 gms.; and [Male] 31108 from 35 mi. S, 14 mi. E Boquillas, 2350 ft., March 12, 1952.

This subspecies of the Black-throated Sparrow occurs in northwestern Coahuila. Miller (1955a:176) stated that the Black-throated Sparrow was moderately common in the open desert scrub at the base of the Sierra del Carmen below 4800 feet. He said that the series of Black-throated Sparrows from the Sierra del Carmen "resembles most the race _opuntia_ of western Texas ... but shows some intergradation toward _grisea_ of southern Coahuila and toward _A. b. bilineata_ of eastern Coahuila." He remarked also that the specimen from Jardin del Sur, which Marsh and Stevenson (1938:287) reported as _A. b. grisea_, was in extremely worn, dirty summer plumage and contributed nothing reliable to racial determination.

*_Amphispiza bilineata grisea_ Nelson.--_Specimen examined:_ one, [Male] 31665, from the north foot of Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 6500 ft., April 25, 1953.

_A. b. grisea_ is the subspecies of Black-throated Sparrow in southern Coahuila. Burleigh and Lowery (1942:208) saw this sparrow "frequently on the arid plateau around Saltillo" and obtained specimens there that were identified as _A. b. grisea_. Amadon and Phillips (1947:581) saw individuals on August 8 and 28 that were feeding "fledged young near Saltillo." The size of its wing (68.5 mm.), the slaty color of its back, and the size (8 mm.) of the white spot on its lateral tail feather suggest that No. 31665 is characteristic of _A. b. grisea_. The size of the testes (4.5x3 mm.) of No. 31665 indicates that _A. b. grisea_ may breed in southern Coahuila.

*_Junco phaeonotus palliatus_ Ridgway.--_Specimens examined:_ total 3: [Male] 35402 (skeleton only) from 13 mi. E San Antonio de las Alazanas, 9345 ft., April 10, 1954; [Female] 33226 (skeleton only) from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955; and [Male] 31633 from Mesa de Tablas, 8600 ft., January 16, 1954, weight, 22 gms.

In Coahuila the Mexican Junco seems to be common. Miller (1955a:177) found it in the conifers of the upper Corte Madera drainage at 7500 feet and up to 8800 feet on Loomis Peak in the Sierra del Carmen. Marsh and Stevenson (1938:287) took an adult in Vivoras Canyon on August 14 in the Sierra del Carmen. Sutton and Burleigh (1939a:46) found small flocks at Diamante Pass in March. Burleigh and Lowery (1942:208-209) noted _J. p. palliatus_ as a common bird of the mountain slopes above an elevation of about 7000 feet in southeastern Coahuila, and obtained specimens at Diamante Pass. Ridgway (1901:300) recorded _J. p. phaeonotus_ from Sierra Encarnacion. His record should be of _J. p. palliatus_ as indicated by Miller, Friedmann, Griscom, and Moore (1957:386). Dickerman saw Mexican Juncos in the Sierra de la Madera on December 13, 1953.

No. 31633 shows no sign of intergrading with _J. p. phaeonotus_ to the south. The outermost rectrix of No. 31633 is wholly white; the second rectrix is nearly as white. No. 31633 is paler than representatives of _J. p. phaeonotus_ from the southern part of the Central Plateau of Mexico.

_Spizella passerina arizonae_ Coues.--_Specimens examined:_ total 4: [Male] 31110 from the Rio Grande (=17 mi. S Dryden, Terrell Co., Texas, in Coahuila), 600 ft., March 18, 1952, weight, 10.7 gms. [Male] 31111 and [Female] 31112 from 4 mi. W Hacienda La Mariposa, 2300 ft., March 24, 1952, weights, 11.0, 11.7 gms.; and [Male] 31666 from the north foot of Sierra Guadalupe (=10 mi. S, 5 mi. W General Cepeda), 6400 ft., April 19, 1953, weight, 14.0 gms.

The Chipping Sparrow is a common spring and possibly fall migrant in Coahuila. Miller (1955a:177) noted small flocks from April 21 to 27 in the Sierra del Carmen where specimens were taken. Burleigh and Lowery (1942:209) indicated that _S. p. arizonae_ was "quite common and of general distribution" at Saltillo and Diamante Pass and remarked that specimens were taken at these localities in April. Amadon and Phillips (1947:581) took two Chipping Sparrows "near Las Delicias on August 17." Dickerman saw individuals in the Sierra del Pino on May 12, 1954, and at San Marcos on May 4, 1954. Our specimens, which are typical representatives of _S. p. arizonae_, are pale; the ground color of their backs is grayish buff.

_Spizella pallida_ (Swainson).--The Clay-colored Sparrow is a migrant or winter visitant in Coahuila. Burleigh and Lowery (1942:209) saw "large flocks of sparrows, mostly of this species, ... on frequent occasions in the cultivated fields and orchards on the outskirts of Saltillo." Four specimens were taken by Burleigh and Lowery (_loc. cit._) on April 19 and 20 at Saltillo.

_Spizella breweri breweri_ Cassin.--_Specimens examined:_ total 2: [Female] 31115 from the Rio Grande (=17 mi. S Dryden, Terrell Co., Texas, in Coahuila), 600 ft., March 18, 1952, weight, 8.2 gms.; and [Male] 31114 from 28 mi. S, 11 mi. E Boquillas, 2000 ft., March 12, 1952, weight, 9.7 gms.

Brewer's Sparrow is probably a winter resident in much of Coahuila. Miller, Friedmann, Griscom, and Moore (1957:389) recorded _S. b. breweri_ from 25 mi. NW Monclova on November 20 and from 8 mi. S Cuatro Cienegas on November 15. The only definite records obtained by Burleigh and Lowery (1942:209) of _S. b. breweri_ are those of a female and a male taken "near Saltillo" on April 16 and 18. The size of the dorsal area of sandy buff with narrow streakings of Nos. 31114-31115 suggests _S. b. breweri_.

_Spizella pusilla arenacea_ Chadbourne.--_Specimen examined:_ one, [Male] 31116, from 4 mi. W Hacienda La Mariposa, 2300 ft., March 24, 1952, weight, 13.1 gms.

The Field Sparrow is an uncommon spring and probably fall migrant in Coahuila. Other than No. 31116, _S. p. arenacea_ has only been recorded from Sabinas in March, when three specimens were obtained (Miller, Friedmann, Griscom, and Moore, 1957:390). The coloration of No. 31116 is much grayer and the black streaks on its back are much narrower than on typical representatives of _S. p. pusilla_.

**_Spizella wortheni wortheni_ Ridgway.--The single specimen of Worthen's Sparrow obtained by Burleigh and Lowery (1942:209) "just outside the limits of Saltillo on April 16" represents the only record of occurrence of this species in Coahuila.

**_Spizella atrogularis atrogularis_ (Cabanis).--Miller, Friedmann, Griscom, and Moore (1957:391) remarked that the Black-chinned Sparrow is a common resident of the Central Plateau from Durango and southern Coahuila southward. Burleigh and Lowery (1942:212) noted the species only at the foot of the mountains of southeastern Coahuila where, at 6000 feet, scattered pairs were found. Miller (1955a:177) observed a male on April 23 on a slope at the mouth of Boquillas Canyon of the Sierra del Carmen; he presumed it to be a transient.

_Zonotrichia leucophrys leucophrys_ (Forster).--_Specimen examined:_ one, [Male] 30243, from 1 mi. SW San Pedro de las Colonias, 3700 ft., February 8, 1951.

The White-crowned Sparrow is a fairly common migrant or winter visitant in Coahuila. Miller, Friedman, Griscom, and Moore (1957:393) recorded _Z. l. leucophrys_ from Sabinas on March 16 and February 23. Burleigh and Lowery (1942:212) remarked that "small flocks of White-crowned Sparrows were seen at infrequent intervals in thickets and stretches of underbrush on the outskirts of Saltillo on April 18 and again on April 24 ... [and] near a small town some twenty miles west of Saltillo on April 22." Specimens that Burleigh and Lowery (_loc. cit._) collected "near Saltillo" were identified as _Z. l. leucophrys_.

_Zonotrichia leucophrys gambelii_ (Nuttall).--_Specimen examined:_ one, [Male] 31117, from Sierra de la Encantada (=38 mi. S, 23 mi. E Boquillas), 4400 ft., March 15, 1952.

Miller (1955a:177) noted _Z. l. gambelii_ on April 27 at 4600 feet in Boquillas wash in the Sierra del Carmen. Hellmayr (1938:568) listed _Z. l. gambelii_ from Sabinas.

_Zontrichia leucophrys oriantha_ Oberholser.--This subspecies has been recorded from Sabinas on April 25 and Hipolito on November 5 (Miller, Friedmann, Griscom, and Moore, 1957:393).

_Melospiza lincolnii lincolnii_ (Audubon).--_Specimen examined:_ one, [Female] 31595, from 20 mi. S Ocampo, 7000 ft., April 5, 1954, measurements: wing, 58 mm.; tail, 50 mm.; weight, 12 gms.

Lincoln's Sparrow seems to be a fairly common migrant or winter visitant in Coahuila; _M. l. lincolnii_ is the common subspecies. Burleigh and Lowery (1942:212) found this sparrow only in a grain field situated between a small pond and a narrow stream on the outskirts of Saltillo; the four specimens collected were identified as _M. l. lincolnii_. No. 31595 was obtained in a pine-oak association.

_Melospiza lincolnii alticola_ (Miller and McCabe).--Miller, Friedmann, Griscom, and Moore (1957:398) listed _M. l. alticola_, which seems to be uncommon in Coahuila, from Sabinas on March 14.

_Melospiza lincolnii gracilis_ (Kittlitz).--Miller (1955a:177) took an unsexed representative of _M. l. gracilis_ on April 7 in Carboneras Canyon of the Sierra del Carmen at 6700 feet. This occurrence is at the extreme eastern range of this subspecies.

_Melospiza georgiana ericrypta_ Oberholser.--In Coahuila this subspecies of the Swamp Sparrow has been recorded as a migrant or winter visitant. Miller, Friedmann, Griscom, and Moore (1957:399) recorded it from Sabinas on February 22 to March 8 and from 8 mi. S Cuatro Cienegas on November 4.

LITERATURE CITED

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1955. Distribution of American gallinaceous game birds. U.S. Dept.
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1947. Notes on Mexican birds. Auk, 64:576-581, October.

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1957. Check-list of North American birds. 5th ed. xiv+691 pp.

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1858. Reports of explorations and surveys for a railroad route from
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BAKER, R. H.
1956. Mammals of Coahuila, Mexico. Univ. Kansas Publ., Mus. Nat.
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1942. Notes on the birds of southeastern Coahuila. Occas. Papers Mus.
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1919. Catalogue of birds of the Americas. Field Mus. Nat. Hist.
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1927. Catalogue of birds of the Americas and the adjacent islands.
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DAVIS, J.
1951. Distribution and variation of the Brown Towhees. Univ.
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DIXON, K. L.
1955. An ecological analysis of the interbreeding of Crested Titmice
in Texas. Univ. California Publ. Zool., 54:125-206, December 8.

EVENDEN, F. G., JR.
1952. Notes on Mexican bird distribution. Wilson Bull., 64:112-113,
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FRIEDMANN, H.
1950. The birds of North and Middle America. U.S. Nat. Mus., Bull.
50(Pt. XI):xiv+793 pp.

FRIEDMANN, H., GRISCOM, L., and MOORE, R. T.
1950. Distributional check-list of the birds of Mexico, Pt. 1.
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GOLDMAN, E. A.
1951. Biological investigations in Mexico. Smithsonian Miscel. Coll.,
115:xiv+476 pp., July 31.

GOLDMAN, E. A., and MOORE, R. T.
1946. The biotic provinces of Mexico. Jour. Mamm., 26:347-360,
February.

GRINNELL, J.
1909. A new cowbird of the genus _Molothrus_ with a note on the
probable genetic relationships of the North American forms.
Univ. California, Publ. Zool., 5:275-281, December 31.

GRISCOM, L.
1950. Distribution and origin of the birds of Mexico. Bull. Mus.
Comp. Zool., 103:341-382.

HARDY, J. W., and DICKERMAN, R. W.
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HELLMAYR, C. E.
1929. Catalogue of birds of the Americas and the adjacent islands.
Field Mus. Nat. Hist. (Publ. 266), Zool. Ser., 13(Pt.
VI):vi+258 pp., November 14.

1934. Catalogue of birds of the Americas. _Ibid._ (Publ. 330),
Zool. Ser., 13(Pt. VII):vi+531 pp., November 15.

1935. _Ibid._ (Publ. 347), Zool. Ser., 13(Pt. VII):vi+541 pp.,
September 16.

1937. Catalogue of birds of the Americas and the adjacent islands.
_Ibid._ (Publ. 381), Zool. Ser., 13(Pt. X):vi+228 pp.,
April 12.

1938. _Ibid._ (Publ. 430), Zool. Ser., 13(Pt. XI):vi+662 pp.,
December 31.

HELLMAYR, C. E., and CONOVER, B.
1942. Catalogue of birds of the Americas. Field Mus. Nat. Hist.
(Publ. 514), Zool. Ser., 13(Pt. I, no. 1):vi+635 pp., April 30.

LOWERY, G. H.
1938. A new grackle of the _Cassidix mexicanus_ group. Occas.
Papers Mus. Zool., Louisiana State Univ., 1:1-11, May 4.

MARSH, E. G., JR., and STEVENSON, J. O.
1938. Bird records from northern Coahuila. Auk, 55:286-287, April.

MAYR, E.
1946. History of the North American bird fauna. Wilson Bull.,
58:3-41, March.

MERRIAM, C. H.
1898. Life zones and crop zones of the United States. U.S. Dept.
Agric., Div. Biol. Surv., 10:1-79.

MILLER, A. H.
1931. Systematic revision and natural history of the American shrikes
(_Lanius_). Univ. California Publ. Zool., 38:11-242,
October 24.

1955a. The avifauna of the Sierra del Carmen of Coahuila, Mexico.
Condor, 57:154-178, May-June.

1955b. A hybrid woodpecker and its significance in speciation in the
genus _Dendrocopos_. Evolution, 9:317-321, September.

MILLER, A. H., FRIEDMANN, H., GRISCOM, L., and MOORE, R. T.
1957. Distributional check-list of the birds of Mexico, Pt. 2.
Pacific Coast Avifauna, 33:1-436, December 20.

MOORE, R. T.
1939. A review of the House Finches of the subgenus _Burrica_.
Condor, 41:177-205, September-October.