Chapter XV: The Dusky Langur. Semnopithecus Obscurus

_Semnopithecus obscurus_, Reid, P. Z. S., 1837, p. 14; Martin, Mammif.
An., p. 486 (1841); Murie, P. Z. S., 1865, p. 742; Gray, Cat. Monkeys
Brit. Mus., p. 14 (1870); Schl., Mus. Pays-Bas, vii., p. 49 (1876);
Anders., Zool. Res. Yun-nan Exped., p. 25 (1878; with full synonymy);
Thomas, P. Z. S., 1886, p. 66; Blanford, Faun. Brit. Ind., Mamm., p. 41
(1891).

_Semnopithecus leucomystax_, Müll. and Schl., Verhandl., p. 59 (1839-44).

_Semnopithecus albocinereus_, Less., Sp. Mammif., p. 65 (1840).

_Presbytis obscura_, Gray, Hand. List Mamm. Brit. Mus., p. 3 (1843);
Blyth, J. A. S. Beng., xiii., p. 467 (1844).

_Semnopithecus halonifer_, Cantor, Proc. Linn. Soc., 1845, p. 235.

CHARACTERS.--Hair on crown not radiating; longer at the back, forming a tuft of yellowish-white. Body blackish-brown, darker on the forehead, sides of face, sides of body and limbs; hands and feet black; nape of neck, and along the middle of back, brownish; tail brownish, not tufted; under surface and inside of limbs not so dark as the back or sides; face black, but the mouth and eyelids whitish; length of body, 21 inches; of tail, 32 inches.

FEMALE.--Slightly browner than the male.

YOUNG.--Bright golden-red, but very soon changing to the colour of the adult.

{124}Mr. Thomas mentions (P. Z. S., 1886, p. 66) a very remarkably coloured individual, differing from all others in having its crest, nape, arms, legs, and tail, yellow, contrasting markedly with the dark hues of the face, body, and feet. It is, however, approached by a specimen in the British Museum from Malacca, collected by Dr. Cantor, which has the crest yellow, and the limbs and tail lighter than usual. Its auditory bullæ, however, are larger and more projecting, and its teeth smaller than is usually the case with _S. obscurus_.

DISTRIBUTION.--Siam; the Malayan Peninsula; Tenasserim, Mt. Mooleyit, at 5,000 feet.