THE SPIDER-MONKEYS. 239 



are also annually killed for food, their flesh being held in high 

 esteem by the natives. 



V. THE WHITE-WHISKERED SPIDER-MONKEY, ATELES 

 MARGINATUS. 



Akles marginaiiis (nee Humb.), Geoffr., Ann. Mus., xiii., 



p. 92, pi. 10 (1809); Kuhl, Beitr. Zool., p. 24 (1820); 



Gray, Cat. Monkeys Brit, Mus., p. 43 (1870); Schl, 



Mus. Pays Bas, vii., p. 174 (1876). 

 Coaita a froiit blanc, femelle, Fr. Guv., Hist. Nat. Mamm., 



livr. Ixii. (Avril, 1830). 

 Aiehs frontalis, Bennett, P. Z. S., 1831, p. 38. 



Characters. — Similar in size and coloration to A. faniscus. 

 Body lean ; hair moderately long and coarse. Face naked, 

 black, except the skin round the eyes, which is flesh-coloured ; 

 general colour black ; under surface of body and inner sides of 

 Hmbs, ashy-grey. It differs from A. pa?tisciis by having the 

 forehead, crown of head, a spot on each side of the nose, and 

 the whiskers, white. 



A specimen in the British Museum has four pre-molars in 

 each upper jaw, instead of the normal three of the Cebidm. 



Distribution. — This species was discovered by Humboldt on 

 the banks of the Santiago river. Mr. Bates says " it is never 

 met with in the alluvial plains of the Amazons," nor, he believes, 

 on the northern side of the great river-valley, except towards 

 its head-waters near the Andes. 



Habits.— According to Von Humboldt, this Spider-Monkey 



known as the " White-Whiskered Coaita "—is very fierce and 



libidinous. Mr. Bates encountered this large and handsome 

 species on the Cupari river, a tributary of the Tapajo.s, one 



