PYGATHRIX 19 



Subfamily 2. Colobinae. 

 GENTJSI. PYGATHRIX. 



*• 3— 2> *-'• 1— 1> "• 2— 2> "^- 3—3 3^- 



PYGATHRIX E. Geofifroy, Ann. Mus. Hist. Nat. Paris, XIX, 1812, 



p. 90. Type Simla nemceus Linnaeus. 

 Presbytis Esch., Kotz. Entd-Reise Siid-See u.n. Berings-Strass., 



&c., Ill, 1821, p. 196, pi. 

 Sentnopitheque F. Cuv., Hist. Nat. Mamm., Ill, 1821, Livr. 



XXX, pi. 

 Semnopithecus F. Cuv., Dents Mamm., 1825, p. 247, pi. IV. 

 Trachypithecus Reichenb., Vollstand. Naturg. Affen, 1862, p. 89, 



pis. XV, XVI, figs. 198-225. 

 Kasi Reichenb., Vollstand. Naturg. Affen, 1862, p. 101, pi. XVII, 



figs. 234, 235, 240, 241. 

 Entellus Gray, Cat. Monkeys, Lemurs and Fruit-eating Bats, Brit. 



Mus., 1870, p. 14. 

 Corypithecus Trouess., Rev. Mag. Zool., 3me Ser., VII, 1879, 



'p. 53. 

 Lophopithecus Trouess., Rev. Mag. Zool., 3me Ser., VII, 1879, 



p. 53. 

 Presbypithecus Trouess., Rev. Mag. Zool., 3me Ser., VII, 1879, 



pp. 52, 56. 



Body slender, elongate ; tail long, slender ; limbs long ; head round ; 

 muzzle short ; thumb short with a flat nail ; cheek pouches absent ; 

 laryngeal sac present ; ridge of stiff hairs projecting forward over eyes. 

 Skull with rounded braincase ; large orbits ; projecting superciliary 

 ridge ; upper molars with four cusps ; posterior lower molar with five 

 cusps. Stomach large, pouches several. 



The Langurs, as the members of the genus Pygathrix are usually 

 called, resemble, in general appearance, the Guenons of the genus 

 Lasiopyga, but are distinguished from them outwardly, by the short 

 thumb, absence of whiskers, and the shorter muzzle; while the head 

 is often ornamented by the elongation of the hairs on the occiput ; and 

 internally they differ from all the Old World Primates, except the 



