_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.