SIMIAD^E. 497 



THE WHITE-THIGHED COLOBUS. 



COLOBUS LEUCOMERUS. (Colobus leucomerus, OGILBY, in Proceed. Zool. Soc. 1837. p. 69.) 



SemnopiihecKs vellerosus .... ISIDORE GEOFJROY, Voyage de Bellanger, p. 37. 



Semnopithecus bicolor WESMAEL, Bull, de 1'Acad. Royale des Sciences, July 4, 1835, 



volii. p. 236. 1836. 



SPECIFIC CHARACTERS. Fur very long, silky, and of a shining black; a frontal stripe, 



the beard encircling the face, the throat, the thighs externally, and the tail, white. 

 LOCALITY. Banks of the Gambia, Western Africa. 



DESCRIPTION. The fur is long, fine, silky, and shining ; the general 

 colour is black ; a white frontal band spreads from the forehead over the 

 whiskers on the sides of the face (which are large), and, passing down, 

 occupies the throat; so that the face is surrounded with white, which is 

 narrowest on the forehead ; the hairs, covering the thighs externally, are 

 white, more or less mixed with black, especially where the white begins 

 to merge into the latter colour ; the tail is long, and of a snowy white : 

 size equal to that of the Guereza. 



A perfect specimen, seen by the Author at an animal preserver's in 

 Paris, 1838, furnished the details of this description. 



An imperfect skin (No. 28, of Catalogue of Mamm. 1838), the original 

 of Mr. Ogilby's description in the Proceedings of the Zool. Soc. 1837, 

 exists in the museum of the Zoological Society, London. It was brought 

 from the River Gambia. Imperfect skins exist in the Museum of Natural 

 History of Paris. 



This remarkable species has received three different specific titles; 

 viz. Semnopithecus vellerosus, Isid. Geoffrey; Semnopithecus bicolor, 

 Wesmael ; and Colobus leucomerus, Ogilby : in Lesson's Species des 

 Mammiferes these stand as the names of three distinct Monkeys. In 

 the present work, that given by Mr. Ogilby is adopted ; for to this 

 naturalist belongs the credit of having correctly characterized it. 



GENERAL HISTORY. The White-thighed Colobus, like the two 

 preceding, has never been observed by European travellers in its native 

 forests ; and nothing is ascertained respecting its habits and instincts, 

 which, it may be believed, resemble those of the other species. 



THE BLACK COLOBUS. 



COLOBUS SAT ANAS. (Colobus Satanas, WATERHOCSE, in Proceed. Zool. Soc. Lond. 1838. p. 58.) 



SPECIFIC CHARACTERS. General colour black ; the fur very long, and but slightly glossy. 

 LOCALITY. Fernando Po. 



DESCRIPTION. The fur is extremely long, rather coarse, intensely 

 black, and but slightly glossy ; there is no under fur ; on the back the 

 hairs measure, on an average, fully ten inches. 



