304 CACAJAO 



and it is hardly worth while to add to difficulties already existing, and 

 which are quite sufficient to give the investigator trouble enough, 

 without bestowing names on possible species that the describer has 

 never seen ! I have included Schlegel's name among the synonyms of 

 this species, on the strength of the Scotch verdict "not proven." The 

 so called white Uakari is probably an immature individual of the 

 present species. 



Cacajao rubicundus (I. Geoff roy). 



Brachyurus rubicundus I. Geoff., Compt. Rend., XXVII, 1848, 

 p. 498 ; Id. Archiv. Mus. Hist. Nat. Paris, 1845, pi. XXX ; Id. 

 Cat. Primates, 1851, p. 57; Wallace, Proc. Zool. Soc. Lond., 

 1852, pp. 107, 108; Casteln., Exped. Amer. Sud, Mamm., 

 1855, p. 19, pi. IV, fig. 2; Reichenb., Vollstand. Naturg. 

 Affen, 1862, p. 76, fig. 189; W. A. Forbes, Proc. Zool. Soc. 

 Lond., 1880, p. 646, pis. LXI, LXII. figs. 1-6; H. O. Forbes, 

 Handb. Primates, 1894, p. 176, pi. XVI. 



Ouakaria rubicunda Gray, Cat. Monkeys, Lemurs and Fruit- 

 eating Bats, Brit. Mus., 1870, p. 62. 



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



RED UAKARI. 



Type locality. North bank of the Amazon opposite Olivenca, 

 Brazil. Type in Paris Museum. 



Geogr. Distr. Forests of the Amazon, north side, from Iga River 

 westward. Exact range not known. 



Genl. Char. Hair on arms and shoulders long, forming a cape. 

 Color like that of the Ourang. 



Color. Entire face, forehead and sides of head naked, bright 

 vermilion red ; middle of head on top gray ; rest of head, neck, limbs, 

 body above and beneath, hands, feet and tail bright chestnut red. 

 Ex type Paris Museum. 



Measurements. Skull of type in specimen. Another example 

 has occipito-nasal length, 102 ; zygomatic width, 66 ; intertemporal 

 width, 42; median length of nasals, 13; length of upper molar series, 

 20 ; length of mandible, 64 ; length of lower molar series, 24. 



Bates in the work from which extracts have already been taken 

 says : "A most curious fact connected with this monkey is the existence 

 of an allied form, or brother species, in a tract of country lying to the 

 west of its district. This differs in being clothed with red instead of 

 white hair, and has been described by Isidore Geoffroy St. Hilaire 



