CHARACTERS.--Nearly allied to _S. entellus_. Face flattened and black; muzzle long and broad; head without a crest; some long superciliary hairs projecting in front, black; whiskers long, running down to the chin, and projecting outwards and backwards, partly concealing the ears, and of a reddish-yellow colour; beard short, also reddish-yellow; hair on the top of the head longer than on the back of the head and temples, black or dark ashy-grey, washed, especially on the front of the head, with rufous; neck, back, upper part of arm, lower portion of the fore-arm, outside of the thighs, and tail (except the tufted tip, which is black), ashy-grey--all these parts being slightly washed with rufous; hands and feet, black; remainder of the limbs rufous; throat, chest, and fore part of the under surface, rich {104}orange-yellow, paler on the hind part of the belly and on the inner side of the limbs. Length of body, 18 inches; of tail, 28½ inches, and with the tuft, 31 inches. Cranium globular; supra-orbital ridges not prominent. The young have the fur soft, silky, and rather long, and are much paler than the adults, and of a soft delicate grey, yellowish-white taking the place of the rufous colour of the adults. (_Anderson._) DISTRIBUTION.--Northern Assam, Arracan, Upper Burma, and Tenasserim. Dr. Anderson observed a troop of this species at Tsingu Myo on the left bank of the Irawaddy, at the lower end of the first defile. HABITS.--This species lives in small troops in the forest. When young it is of a mild disposition; but, when fully adult, the males are ill-natured and fierce. III. THE HANUMAN LANGUR. SEMNOPITHECUS ENTELLUS. _L'entelle_, Audeb., Singes, Fam. V., sect. ii., fig. 2 (1797). _Simia entellus_, Dufresne, Bull. Soc. Philom., i., p. 49 (1797). _Cercopithecus entellus_, Latr., Hist. Nat. Buff., xxxvi., p. 283 (1809). _Semnopithecus entellus_, Desm., Dict. Class. H. Nat., vii., p. 568 (1825); Sykes, P. Z. S., 1831, p. 199; Blyth, J. A. S. Beng., xii. (1843), p. 169; xiii. (1844), p. 470; Hutton, P. Z. S., 1867, p. 944; Gray, Cat. Monkeys Brit. Mus., p. 14 (1870); Schlegel, Mus. Pays-Bas, vii., p. 60 (1876); Anderson, Rep. Zool. Exped. Yun-nan p. 15 (1878; with full synonymy); Blanford, Faun. Brit. Ind., Mamm., p. 27 (1891). _Semnopithecus anchises_, Elliot; Blyth, J. A. S. Beng., xiii. (1844), p. 470; xvi. (1847), p. 733. {105}_Presbytis entellus_, Gray, Hand-List Brit. Mus., p. 4 (1843; in part); Blyth., _op. cit._, xvi., pp. 732, 1271, pl. liv., fig. 1 1847; id., Cat. Mamm. As. Soc. Mus., p. 11 (1863); Jerdon, Mamm. Ind., p. 4 (1867). _Semnopithecus albogularis_, Müll. u. Schl., Verh. Nat. Gesch., 1839-44, p. 58 (_fide Anderson_).