PITHECIA 295 



Yarkea ochrocephala Reichenb., Vollstand. Naturg. Affen, 1862, 



p. 26. 

 Pithecia nocturna Schleg., Mus. Pays-Bas, Simiae, 1876, p. 217. 



(Part.). 



GOLDEN-HEADED SAKI. 



Type locality. "Banks of the Amazon." Type not in Paris 

 Museum. 



Geogr. Distr. Near Barra, Rio Negro, (Natterer). 



Genl. Char. Head ochraceous buff instead of white. Teeth large ; 

 throat and chest bare, black. Lips covered with short white hairs. 



Color. Male. Head and sides of throat ochraceous buff, divided 

 by a black naked line on top of head; rest of pelage of body, limbs, 

 hands, feet and tail black. 



Female. General color of head, upper parts, flanks, limbs, hands, 

 feet and tail brownish black, hairs tipped with buff. This color is very 

 prominent on the forehead, about ears and beneath eyes ; under parts 

 and inner side of limbs orange buff. Several specimens are in the Vienna 

 Museum collected by Natterer at Paraguay, Barra do Rio Negro. 



Measurements. Total length about 670 ; tail, 340. Skull : occipito- 

 nasal length, 65 ; zygomatic width, 46 ; intertemporal width, 33 ; palatal 

 length, 23 ; breadth of braincase, 39 ; median length of nasals, 13 ; 

 length of upper molar series, 17; length of mandible, 42; length of 

 lower molar series, 20. Ex specimen from Rio Negro in British 

 Museum called leucocephala. 



This species varies considerably both among adult individuals and 

 also at different ages ; the young being more or less reddish brown and 

 the females resembling young males, reddish brown hairs tipped with 

 buff in the color of their pelage, with a white band bordering the front 

 of the cheek. 



Kuhl's types of P. ochrocephalus and P. rufibarbata are both in 

 the Leyden Museum and both are immature. P. ochrocephalus has 

 begun to assume the black pelage on different parts of the body, 

 especially on the limbs, the hairs of which are tipped with ochraceous ; 

 and the hairs around face and on front of head are buff, probably 

 faded, and much paler than the adult P. ochrocephalus. P. ruHbarbata 

 is a very young animal about half grown and completely in the brown 

 pelage. 



Pithecia albinasa I. Geoff roy et Deville. 



Pithecia albinasa I. Geoff, et Deville, Compt. Rend., XXVII, 

 1848, p. 498; I. Geoff., Cat. Primates, 1851, p. 56; Id. Archiv. 



