Chapter VII: The Masked Titi. Callithrix Personata

_Callithrix personatus_, Geoffr., Ann. Mus., xix., p. 113 (1812); Spix,
Sim. et Vespert. Bras., p. 18, pl. 12 (1823); Gray, Cat. Monkeys Brit.
Mus., p. 56 (1870).

_Callithrix brunnea_, Wagner, Arch. f. Naturg., 1842, i., p. 357 (ex
Natterer, MSS.).

_Pithecia melanops_, Vigors, Cat. Coll. Zool. Soc., p. 6.

_Callithrix personata_, Schl., Mus. Pays. Bas, vii., p. 231 (1876).

CHARACTERS.--Size larger than that of the other Titis. Style of fur the same as in the previous species, but longer, and the long stiff hairs more bristly; general colour black, mottled with grey rings on the hairs; back grizzled grey; entire head, hands, feet, and lower part of limbs, black; chest, under side of the body, and tail dark ashy-grey, the latter washed at the base, sometimes extensively, with rufous, and grey towards the tip below.

FEMALE.--Body strongly washed with whitish-yellow, and the tail with rufous; forehead between the ears, black.

{164}DISTRIBUTION.--Upper Amazon. Of all the species of the genus, this ranges furthest to the south--to 14° S. lat.

VIII. THE BLACK-FRONTED TITI. CALLITHRIX NIGRIFRONS.

_Callithrix nigrifrons_, Spix, Sim. et Vespert. Bras., p. 21, pl. 15
(1823); Gray, Cat. Monkeys Brit. Mus., p. 56 (1870); Schl., Mus. Pays
Bas, vii., p. 232 (1876).

CHARACTERS.--Nearly allied to the Masked Titi (_C. personata_), but distinguished by the nearly white back of the head and nape of the neck, and by the hairs at the base of the tail being entirely red.

DISTRIBUTION.--Upper Amazonia.