Chap. XVIIL 



QUADRUMANA. 



311 



in some degree probable that both sexes owe their 

 elegant appearance to sexual selection. In the mons- 

 tache-monkey (Gercopithecus eephus) the general colour 

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

 the male the end of the tail is chesnut ; but the face is 

 the most ornamented part, the skin being chiefly bluish- 

 grey, shading into 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 



Kig. 76. 



Gercopithecus Diana (from Brehm). 



