CEBUS 105 



LARGE-HEADED CAPUCHIN. 



Type locality. Lake Cactua, near the Rio Solimoens. Type in 

 Munich Museum. 



Geogr. Distr. Rio Negro west of its mouth, (Brazil) ; Lake 

 Cactua, (Spix) ; Rio Negro, (Natterer). 



Color. Top of head, nape and back of neck black ; hair on head 

 very thick, with tufts higher on sides than in the middle, but no horns 

 nor real crest present ; arms to elbows, entire upper parts of flanks and 

 thighs reddish golden brown, darkest in dorsal regions ; forearms and 

 legs below knees black, hairs tipped with rusty blackish ; brown band 

 in front of ears extending down sides of face and meeting under the 

 chin ; entire under parts, and inner side of arms above elbows ochra- 

 ceous rufous ; hands, feet, inner side of legs, and anal region black ; 

 tail above at base like back, remainder black, beneath black. 



Measurements. Total length, 860; tail, 420; foot, 120. Skull: 

 total length, 99.6; occipito-nasal length, 85.6; intertemporal breadth, 

 41.2; width of braincase, 53 ; Hensel, 71 ; zygomatic width, 75 ; median 

 length of nasals, 28.8 ; palatal length, 33.1 ; length of upper molar 

 series, 22.6; length of mandible, 61.5; length of lower molar series, 

 26.8. 



This species varies greatly even among specimens from the same 

 locality. The type represents the paler style, but the majority of 

 examples, perhaps, are very much darker with many black hairs 

 mingled with the reddish brown, especially on the dorsal region and 

 rump. It is a paler species than C. fatuellus which has more of the 

 chestnut color on the upper parts of the body ; and the present form 

 has no black on the under parts which is characteristic of the adults of 

 C. FATUELLUS. But there is a great deal of variation in both species 

 and it is by no means easy occasionally to refer correctly certain 

 specimens to their rightful species. Spix in his description speaks of 

 a frontal crest, but his plate shows none, and there is none in the 

 strict interpretation of the term, but there is a tuft on each side of the 

 head from the forehead, and the center or dividing line of these tufts 

 is higher than the hair on top of the head behind. 



Cebus veesuta Elliot. 



Cebus versuta Elliot, Ann. Mag. Nat. Hist., V, 8th Ser., 1910, 



p. 77. 

 Type locality. Araguay, Rio Jordao, western part of Minas 

 Gerffis, Brazil. Type in British Museum. 



