CALLITHRIX 239 



Bates, (1. c.) states that while walking about the streets of Para 

 he counted thirteen different species of monkeys, and, of these, two he 

 never met again in any part of the country. One of these was Hapale 

 JACCHUS. "It was seated on the shoulder of a young mulatto girl, as 

 she was walking along the street, and I was told had been captured in 

 the island of Marajo." This appears to be about the only identified 

 locality in which this species is found, for previous authors, as a rule, 

 in giving the range of C. jacchus have so confounded several species 

 together, as to make it practically impossible to designate the geo- 

 graphical limits of this long and well known species ; and of its 

 range in Brazil but little is known even at this late day. 



Callithrix FLAvicEPS (Thomas). 



Hapale flaviceps Thos., Ann. Mag. Nat. Hist., XII, 7th Ser., 1903, 

 p. 240. 



YELLOW-HEADED MARMOSET. 



Type locality. Engenheiro Reeve, Province of Espirito Santo, 

 Brazil. Type in British Museum. 



Color. Face and forehead whitish; head, throat, neck, shoulders, 

 upper part of chest and inner side of arms, buff or buff yellow, upper 

 parts showing the tawny, black, and gray color which each hair exhibits, 

 the tawny not visible on lower back and rump, where the other two 

 colors are ranged in black and grayish white bands across the body; 

 outer side of arms yellowish ; outer side of legs dark gray ; middle of 

 chest and abdomen, and spot between legs black, rest of abdomen tawny ; 

 hands and feet mixed dark brown and yellowish ; tail ringed with 

 black and gray, and a black spot on each side of base. Ex type British 

 Museum. 



Measurements. Total length, 546 ; tail, 298 ; foot, 65 ; ear, 23. 

 Skull: occipito-nasal length. 47; Hensel, 33; zygomatic width, 31; 

 intertemporal width, 23 ; palatal length, 15.5 ; width of braincase, 28.5 ; 

 median length of nasals, 8 ; length of upper molar series, 10 ; length of 

 mandible, 31 ; length of lower molar series, 13. 



Callithrix leucocephala (E. Geoffrey). 



Jacchus leucocephalus E. Geoff., Ann. Mus. Hist. Nat. Paris, XIX, 

 1812, p. 119; Desm., Mamm., 1820, p. 93; Fisch., Syn. 

 Mamm., 1829, p. 61 ; Addend., 1830, p. 61 ; Reichenb., Voll- 

 stand. Naturg. Affen, 1862, p. 4, fig. 16 ; Gray, Cat. Monkeys, 

 Lemurs and Fruit-eating Bats, Brit. Mus., 1870. p. 63, var. 5. 



Jacchus vulgaris Gray, Cat. Monkeys, Lemurs and Fruit-eating 

 Bats, Brit. Mus., 1870, p. 63, var. 4 and 5. 



