294 P1THECIA 



Geogr. Distr. Interior of Demerara, French Guiana; British 

 Guiana ; and the region of the Rio Negro and Rio Branco, Brazil. 



Genl. Char. Hair very long both on body and tail ; sexes differ- 

 ently colored. 



Color. Male. Head grayish white, becoming yellowish on sides 

 and tawny ochraceous about the lips and throat ; face naked, black, and 

 a narrow black naked line on the center of the head dividing the white 

 hairs ; entire rest of pelage, body, limbs, hands, feet and tail black. 



Female. Brownish black, hairs tipped with buff or buff yellow; 

 belly red. 



Measurements. Total length about 750 ; tail, 400. Skull : occipito- 

 nasal length, 69 ; zygomatic width, 49 ; intertemporal width, 35 ; palatal 

 length, 33; breadth of braincase, 42; median length of nasals, 14; 

 length of upper molar series, 16; length of mandible, 48; length of 

 lower molar series, 19. 



Gray (1. c.) refers his P. leucocephala to P. chrysocephala 

 Geoff., having never seen the type specimen and considers Geoffroy's 

 P. leucocephala as distinct. In this he was mistaken, as both Gray's 

 and Geoffroy's leucocephala are the same, and not separable from P. 

 pithecia Linn. In the same paper, Proc. Zool. Soc. Lond., 1860, he 

 refers his P. irrorata correctly to P. monacha. 



There are two specimens in the Paris Museum marked P. rufi- 

 venter but neither are marked "Type," and the whereabouts of that 

 important example is unknown. The type of Pithecia pogonias Gray, 

 is in the British Museum. It is a female with the red belly, and in all 

 respects resembles the females of P. pithecia. A specimen in the 

 Paris Museum marked "Type" on the label, and on the bottom of the 

 stand, "leucocephalus G. St. H." is probably Audebert's type which is 

 exactly the same as S. pithecia Linn. It is a male. 



Pithecia chrysocephala I. Geoffroy. 



Pithecia chrysocephala I. Geoff., Compt. Rend., 1850, p. 875 ; Id. 

 Cat. Primates, 1851, p. 55; Id. Archiv. Mus. Hist. Nat. Paris, 

 V, 1852, p. 557, pi. XXIX; Gray, Proc. Zool. Soc. Lond., 

 1860, p. 230; Sclat, Proc. Zool. Soc. Lond , 1871, p. 228; von 

 Pelz., Bras. Saugth., 1880, p. 14. 



Pithecia rufibarbata Kuhl, Beitr. Zool. 1820, p. 44, $ ; Less., Spec. 

 Mamm, 1840, p. 175. 



Pithecia ochrocephala Kuhl, Beitr. Zool., 1820, p. 44, juv. ; Less., 

 Spec. Mamm., 1840, p. 175. 



