92 Lloyd's natural history 



Piliocolobus boiiviertj Rochebr., torn, cit.^ p. io8, pi. iv. 

 Piliocolobus tholloni, Rochebr., torn, cit.^ p. no, pi. v. 



Characters. — Body robust, covered with rather long hairs; 

 face naked, blackish-blue, except the tip of the nose, corners 

 of the mouth and edge of lower lips, which are flesh-colour ; 

 ears naked, blackish-blue; nose short and somewhat promi- 

 nent; frontal hairs erect, directed forward, black ; top and back 

 of the head as far as the nape, black; back, sides, outer aspect 

 of the thighs, base and upper surface of the tail, bluish or olive- 

 black, with whitish hairs mingled on the shoulders and thighs ; 

 sides of the face from the middle of the cheek backwards to a 

 point behind (enclosing the ears), neck, chin, and throat, the 

 under surface of body, as well as the whole of the limbs (except 

 the outer aspect of the thighs), and the under surface of the tail, 

 rich rufous ; tips of the fingers and toes black. Length of 

 body, 29 inches ; of tail, 31 inches. The hairs are all uniformly 

 coloured. The thumb is often fairly well developed, and may 

 have a nail. 



This species is extremely variable in the coloration of its fur ; 

 the back in some varieties is rufous, the cheeks and throat may 

 be sandy-yellow or white, and the under side whitish or white, 

 and the outside of the fore-limbs may be black, or agreeing in 

 colour with the outside of the thighs. The well developed 

 fcetus shows no signs of the varied coloration of later life, but 

 is quite white. 



Distribution. — West Africa. Not uncommon along the whole 

 West Coast. 



Habits. — Like many of the other species of the genus, this 

 species keeps to the tops of the highest trees of the forest. 

 Its food consists of fruits and leaves. 



