Distribution.—South-east Borneo, where it is very rare.
XXV. THE DOUC LANGUR. SEMNOPITHECUS NEMÆUS.
Simia nemæus, Linn., Mantiss. Plant., p. 521 (1771); Schreber, Säugeth., i., p. 110, pl. xxiv. (1775).
Cercopithecus nemæus, Erxl., Syst. Règn. An., p. 42 (1777); Kuhl, Beitr. Zool., p. 8 (1820).
Pygathrix nemæus, Geoffr., Ann. Mus., xix., p. 90 (1812).
Lasiopyga nemæus, Desm., Mamm., p. 54 (1820); Gray, Cat. Monkeys Brit. Mus., p. 13 (1870).
Semnopithecus nemæus, F. Cuv., Hist. Nat. Mamm., livr. 14 (May, 1825); Martin, Mammif. Anim., p. 459 (1841); Wagner in Schreb. Säugeth. Suppl. v., p. 35 (1855); Schl., Mus. Pays-Bas, vii., p. 64; Anderson, Zool. Res. Exped. Yun-nan, p. 40 (1878; with full synonymy).
Presbytis nemæus, Blyth, J. A. S. Beng., xliv., p. 11 (1875).
Characters.—Head without a crest. The naked face, the callosities, and the naked portions of the hands and feet yellow; head brown, with a narrow band of chestnut passing under the ears backwards, and a second but broader one, margined with black, across the chest, from shoulder to shoulder; whiskers long and directed backwards, pale grey—the hairs ringed with black and white; upper surface of the body and sides grey; base of the neck, chest, and shoulders as well as the upper part of the fore- and hind-limbs, with the hand and feet, black; the forehead paler; the fore-arm to the middle of the hands, the rump, posterior region of the loins, and the tail pure white; the lower portion of the hind-limbs to the middle of the feet reddish-brown. Tail shorter than the body. Length of body, 25 inches; of tail, 20½ inches.
In the skull the forehead is low, the intra-orbital region broad and the facial portion broad at the base. (Anderson.) The thumb is well developed. The fœtus is remarkable for its motley coloration, and shows also the white rump-spot.