CACAJAO 301 



GEOGRAPHICAL DISTRIBUTION OF THE SPECIES. 



The dispersion of the species of this genus is given in the articles 

 as described by Bates in the passages quoted. Briefly it may be said 

 that C. CALVus is confined to the west side of the Japura River near 

 its mouth ; to the banks of the Uatiparana near Tonantins ; C. rubi- 

 CUNDUS inhabits the eastern half of the western part of the Japura 

 delta, an extent of country 150 miles long by 60 or 80 wide, and C. 

 MELANocEPHALus is found 180 miles from the mouth of the Japura 

 according to Bates, but Humboldt says it is met with in the forests 

 watered by the Cassiquiare, Negro and Branco rivers. 



KEY TO THE SPECIES. 



A. Face naked, tail short. 



a. General color whitish gray C. calvus. 



b. General color bright chestnut red C. rubicundus. 



c. General color black and chestnut red . . . .C. melanocephalus. 



Cacajao CALVUS (I. Geoff Toy) . 



Brachyurus calvus I. Geoff., Archiv. Mus. Hist. Nat., Paris, 1845, 



p. 560; Id. Compt. Rend., XXVII, 1848, p. 576; Id. Cat. 



Primates, 1851, p. 57; Casteln., Exped. Amer. Sud, Mamm., 



1855, p. 17, pi. IV, fig. 1 ; Bates, Nat. Riv. Amaz., 1863, p. 



308; Mivart, Proc. Zool. Soc. Lond., 1865, p. 586, (note) ; 



Dahlb., Stud. Zool. Fam. Reg. Anim. Natur., fasc. I, 1856, p. 



180; Reichenb., Vollstiind. Naturg. Affen, 1862, p. 70; W. A. 



Forbes, Proc. Zool. Soc. Lond., 1880, p. 646; 1887, p. 119, pi. 



XII; Beddard, Proc. Zool. Soc. Lond., 1887, p. 119, pi. XII; 



N. O. Forbes, Handb. Primates, I, 1894. p. 177. 

 Ouakaria calva Gray, Proc. Zool. Soc. Lond.. 1849, pp. 8, 10, fig. 



(skull) ; Id. Cat. Monkeys, Lemurs and Fruit-eating Bats, 



Brit. Mus., 1870, p. 62. 

 Scarlet-faced Monkey Bates, Nat. Riv. Amaz., II, 1863, p. 313, fig. 

 Pithecia calva Schleg., Mus. Pays-Bas, Simiae, 1876, p. 228. 



B.4LD OR UHITE UAK.4RI. 



Type locality. Banks of the Japura River, opposite Fonteboa, 

 Brazil. Type in Paris Museum. 



Geogr. Distr. Amazonian region, Brazil, in the angle formed by 

 the union of the Japura River and the Amazon. 



