260 ALLEN'S NATURALIST'S LIBRARY. 



General colour of fur black, fringed with yellow ; centre of the 

 crown of head, crest, nape (extending down the back), and 

 sides of the body black ; beard citron-yellow ; callosities and 

 surrounding naked skin violet ; genital and anal regions 

 scarlet. 



Female and Young Male. Facial rugosities less marked out- 

 wardly, as well as on the skull, than in the adult male, and the 

 purple colour of the grooves wanting. The nose is black, not 

 scarlet. 



A hybrid between a female of this species and a male 

 Macaque (M. cynomologus) was born in the Zoological Gardens 

 of London in October, 1878. 



Distribution. West Africa, from Senegambia to the Congo. 



Habits. These hideous and extraordinary animals live to- 

 gether in large companies, and are a terror to the natives. 

 They are less ill-dispositioned when young, but when adult, they 

 are very savage. They are nearly omnivorous, but fruits and 

 insects form their chief food. When the Mandrill is in any 

 way excited, the brilliantly-coloured naked parts of the skin 

 are said to become still more vividly coloured. 



II. THE DRILL. PAPIO LEUCOPHjETJS. 



Simla leucophcea, F. Cuvier, Ann. Mus., ix., p. 477, pi. 37 



(1807); id. Hist. Nat. Mamm., livr. iv., p. 637 (1807). 

 Papio hucophaa, Gray, List Mamm., Brit. Mus., p. 10 (1843). 

 Chceropithecus leucophaus, Gray, Cat. Mamm., Brit. Mus., p. 



35 ( l8 7)- 

 Papio leucoph&us, Schl., Mus. Pays Bas, vii., p. 131 (1876). 



(Plate XXII.) 

 Characters. Somewhat similar to C. maimon, but body less 



