BEAUTY OF THE QUADRUMANA. 



547 



nal differences In color, which renders it in some degree probable 

 that both sexes owe their elegant appearance to sexual selection. 

 In the moustache-monkey (Cercopithecus cephus) the general 

 color of the fur is mottled-greenish with the throat white; in 

 the male the end of the tail is chestnut, but the face is the most 

 ornamented part, the skin being chiefly bluish-gray, shading into 



Fig. 78. Cercopithecus diana (from Brehm). 



a blackish tint beneath the eyes, with the upper lip of a delicate 

 blue, clothed on the lower edge with a thin black moustache; the 

 whiskers are orange-colored, with the upper part black, forming 

 a band which extends backwards to the ears, the latter being 

 clothed with whitish hairs. In the Zoological Society's Gardens 

 I have often overheard visitors admiring the beauty of another 

 monkey, deservedly called Cercopithecus diana (fig. 78); the 

 general color of the fur is gray; the chest and inner surface of the 



