_Presbytis mitrata_, Escholtz, in Kotzeb. Reis., p. 196, _cum tab._
(1821).
{138}_Semnopithecus comatus_, Desmar., Mamm. Suppl., p. 533 (1822);
Martin, Mammif. Anim., p. 468 (1841); Wagner in Schreber Säugeth. Suppl.
v., p. 24 (1855).
_Semnopithecus fulvo-griseus_, Desmoul., Dict. Hist. Nat., vii., p. 570
(1825).
_Semnopithecus fascicularis_, Owen, P. Z. S., 1833, p. 75.
_Semnopithecus mitratus_, Schl., Essai Phys. Serp., p. 237 (1837);
Geoffr., Cat. Méth. Primates, p. 16 (1851); Gray, Cat. Monkeys Brit.
Mus., p. 16 (1870); Schl., Mus. Pays-Bas, vii., p. 37 (1876); Anders.,
Zool. Res. Exped. Yun-nan, p. 36, (1878; with full synonymy).
_Semnopithecus siamensis_, Müll. u. Schl., Verh., p. 60 (1841); Anders.,
_t.c._, p. 37 (with synonymy).
_Semnopithecus albo-cinereus_, Blyth, J. A. S. Beng., xii., p. 175
(1843); Schl., Mus. Pays-Bas, vii., p. 38 (1876).
_Presbytes argentatus_, Blyth; Horsf. Cat. Mamm. E. I. Co. Mus., p. 7
(1851).
_Semnopithecus nigrimanus_ et _S. cinereus_, Mivart, P. Z. S., 1864, pp.
625, 626.
_Presbytes cristatus_ (nec Raffles) et _P. melanolophus_, Blyth, Mamm.
Burma, p. 9 (1875).
CHARACTERS.--Head with a compressed blackish crest; hairs radiating from
the forehead over the eyes; crown above grey, mingled with black, becoming
black on the front of the crest and nape of the neck; flanks, under surface
of the body and tail, as well as the inner side of the limbs, dirty white;
hands and feet whitish, mixed with black or reddish hairs; upper surface of
the tail dark grey, the tip paler and tufted; ears and face deep black;
legs flesh-coloured; chin and throat white. Length of body, 20½ inches; of
tail, 28½ inches.
The hind-most lower molar has generally only four tubercles.
{139}The variety of this species inhabiting Siam has a fleshy-white area
round the eyes and mouth.
DISTRIBUTION.--Siam; the Malay Peninsula; and Sumatra.