SEMNOPITHECUS. 15 



on the left bank of the Irawady at the entrance or lower end of the first 

 defile. The young are much paler than the adults, and are a soft delicate grey, the 

 areas which are ferruginous or orange-yellow in the mature animal being albescent 

 or only slightly fulvous. The fur is soft, silky, and rather long ; and the tail is 

 tufted, and in the young is almost grey. 



A specimen w^hich I had alive for some time, and which w^as caught in Northern 

 Assam, was, like young Semnopitheci generally, of a mild disposition. This, how- 

 ever, is not the character of these animals in the adult state, for their tempers 

 become unreliable, and the males when irritated are very fierce and determined in 

 attack. 



This species in the general distribution of its colouriug and in the strong 

 projecting supraorbital ridge of hairs more closely resembles S. entellus and its 

 near allies than any of the other Semnopitheci, 



Having had the opportunity to examine nearly all the types of the different 

 species of Semnopithecus, I subjoin the results of my observations. 



SEMNOPITHECUS ENTELLUS, DufrCSnC. 



L'entelle, Audebert^ Hist. Nat. des Singes^ 1797, Fam. iv. sec. ii. fig. 2 ; Latr. Hist. Nat. de 



Buff on (Somiini) vol. xxxvi. (1809), p. 85, pi. Ivi. 

 Simla entellus, Dufresne, Bull. Soc. Philom. vol. i. 1797, p. 49; Mag. E ncy clop. vol. iv. 1797; 



F. Cuv. Diet, des Sc. Nat. vol. xx. 1821, p. 33. 

 Cercopithecus entellus, Latr. Hist. Nat. de Buffon, vol. xxxvi. (Sonnini ed.) 1809, p. 283 ; Nouv. 



Diet. d^Hist. Nat. vol. xv. 1817, p. 581; Kuhl. Beitr. zu Zool. 1820, p. 12; Desmarest, 



Mamm. 1820, p. 59. 

 Semnopithecus entellus, Desmoulins, Diet. Class d^Hist. Nat. vol. vii. (1825), p. 568; Lesson, 



Man. de Mamm. 1827, p. 40; Griffith, An. King. vol. v. 1827, p. 10; Cuv. Eeg. An. nouv. 



ed. vol. i. 1829, p. 94; Fischer, Syn. Mamm. 1829, p. 14; E. T. Bennett, Garden and Monog. 



Zool. Soc. vol. i. 1831, p. 81 ; Sykes, Proc. Zool. Soc. 1831, p. 199 ; Owen, Proe. Zool. Soe. 1833, 



p. 75; Is. Geoff. St.-Hil. Zool. Yoy. de Belanger, 1834, p. 38; Waterhouse, Cat. Mamm. 



Mus. Zool. Soe. Lond. 1838 (second ed.), p. 4; Martin, Charlesworth^s Mag. Nat. Hist. new. 



ser. vol. ii. 1838, p. 435 ; Elliot, Madr. Journ. Lit. and Sc. vol. x. 1839, p. 95 ; Nat. 



Hist. Monkeys, 1841, p. 461; Wagner, Schreber, Saugeth. Suppl. vol. i. 1840, p. 99, 



pi. xxiii. B; Suppl. vol. v. 1855, p. 32; Lesson, Sp. des Mammif. 1840, p. 56; Martin, Nat. 



Hist. Quadr. 1841, p. 461 (plate); Blyth, Journ. As. Soc. vol. xii. 1843, pp. 169, 172; 



vol. xiii. 1844, pp. 470, 476; Miiller und Sehlegel, Verhandl. 1839, pp. 44, 59; Sehinz, 



Syn. Mamm. vol. i. 1840, p. 42; Is. Geoff. St.-Hil. Cat. Method, des Mammif. 1851, p. 13 ; 



Arch, du Mus. vol. v. 1852, pp. 537, 538; Horsf. Cat. Mamm. E. Ind. Co. Mus. 1851, p. 4 ; 



Gervais, Hist. Nat. des Mammif. 1854, p. 60 ; Dahlbom, Stud. Zool. Fam. Reg. An. 1856, 



pp. 87, 89 ; Beyrich, Abhandl. der Berl. Akad. der Wiss. 1860, p. 7 ; Roy, Lankester 



Quart. Journ. Sc. 1865, p. 562; Hutton, Proc. Zool. Soc. 1867, p. 944; Gray, Cat. 



Monkeys and Lemurs, B. M. 1870, p. 14, var. 1 ; A. M.-Edwards, Arch, des Mammif. 



1868-74, p. 242. 

 Preshytis entellus. Gray, Hand-list, B. M. 1843-; p. 4 (in part) ; Blyth, Journ. As. Soc, vol. 



xvi. (1847), p. 732; Ann. and Mag. Nat. Hist. vol. xx. (1^51), p. 313; Cat. Mamm. Mus. 



As. Soc. Bengal, 1863, p. 11 ; Jerdon, Mamm. Ind. 1867, p. 4. 

 Semnopitliecus albogularis, Miiller und Sehlegel, Verhandl. 1839-44, p. 58. 



