1 86 ALLEN'S NATURALIST'S LIBRARY. 



Distribution. Interior of Demerara, Kaicteur Falls; Rio Negro, 

 and Rio Branco in Amazonia ; Cayenne ; Surinam. 



III. THE BLACK SAKI. PITHECIA SATANAS. 



Saki noir, F. Cuv., Hist. Nat. Mammif., pi. 78. 



Siinia satanas, Hoffm., Mag. Ges. Berl., x., p. 93 (1807); 



Humb., Obs. Zool., i., p. 314, pi. xxvii. (1811). 

 Pithecia satanas, Geoffr., Ann. Mus., xix., p. 115 (1812); Scl., 



P. Z. S., 1864, p. 7 1 2, pi. xli. ; id., t. c. p. 138; Schl, 



Mus. Pays Bas, vii., p. 224 (1876). 

 Chiropotes cuxio, Lesson, Sp. Mamm. Bimanes et Quadrum., 



p. 179 (1840). 



Chiropotes ater, Gray, Cat. Monkeys Brit. Mus., p. 61 (1870). 

 Chiropotes satanas, Gray, t. c. p. 61. 



Characters Male. Fur soft ; tail bushy and as long as the 

 body; crown with long black hair arranged on each side, 

 divided by a central line. " The hair of the head sits on it 

 like a cap, and looks as if it had been carefully brushed." (Bates.} 

 Long whiskers on each side, and the chin with a moderate 

 beard. Fur black and shining ; back sometimes washed with 

 grey or ashy-brown. 



Female. Similar to the male, but having a browner back. 



Young. Beard absent or rudimentary ; hair of crown radiating 

 from centre and projecting forwards. 



The skull in this species is sometimes ossified into one 

 piece. 



Distribution. Lower Amazonia ; Para ; British Guiana ; the 

 River Orinoco, towards the Rio Negro. 



Habits, Little is known of the habits of the Black Saki, 

 which is also known under the names of " Cuxio " and " Mono 



