HABITS.--The "Simpai," as the Malays call this Langur, is very abundant in Sumatra, where the present writer has obtained it both in the north of the Palembang Presidency and in the south of the Lampongs. It is undoubtedly in part to this species that Dr. Wallace refers in his "Malay Archipelago," when, at Lobo Raman, he says that they frequented the trees overhanging the guard-house in which he was staying. "Two species of _Semnopithecus_ were most plentiful--Monkeys of a slender form and long tails. Not being much shot at, they are rather bold, and remain quite unconcerned when natives alone are present, but when I came out to look at them, they would stare for a minute or two and then make off. They take tremendous leaps from the branches of one tree to those of another a little lower, and it is very amusing when one strong leader takes a bold jump, to see the others following with more or less trepidation; and it often happens that one or two of the last seem quite unable to make up their minds to leap till the rest disappear, when, as if in desperation at being left alone, they throw themselves frantically into the air, and often go crashing through the slender branches and fall to the ground." XXVIII. THE MITRED LANGUR. SEMNOPITHECUS MITRATUS. _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.