_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
{135}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 foetus is remarkable for its motley coloration, and shows
also the white rump-spot.
FEMALE.--Like the male. The young differ but little from the parents. Aged
individuals retain the coloration of their maturity.