CEBUS 103 



Cebus apella (nee Linn.), T. Geoff., Cat. Primates, 1851, p. 42, 

 (examples "avec pinceau") ; Gray, Cat. Monkeys, Lemurs 

 and Fruit-eating Bats, Brit. Mus., 1870, p. 48. 



Cebus (Eucebus) Hstulator Reichenb., Vollstand. Naturg. Affen, 

 1862, p. 56, pi. VI, fig. 86. 



Cebus (Otocebus) fatuellus Reichenb., Vollstand. Naturg. Affen, 

 1862, p. 46, pi. VIII, figs. 124, 128, 129, 135. 



Type locality. Unknown. 



Geogr. Distr. Tolima and Upper Magdalena Valley, Colombia, 

 at an elevation of from 5,(X)0 to 7,000 feet. Peru? 



Gent. Char. Hair over temples elevated into short horn-like crests 

 in adults. 



Color. Forehead, temples, sides of head, face and chin, grayish 

 white ; face, flesh color ; top of head and hair tufts and back of neck, 

 line inside of face in front of ears meeting beneath the chin, fore- 

 arms, legs, hands, feet and tail, black; arms from shoulders to elbows 

 yellowish, near wood brown but paler; upper parts dark Vandyke 

 brown, dorsal line reddish chestnut, blackish on rump ; hairs on 

 under parts yellowish white at base, then reddish, and the apical half 

 black. 



Measwrements. Skull : occipital part missing ; intertemporal width, 

 33 ; palatal length, 30 ; breadth of braincase, 50 ; median length of 

 nasals, 13; zygomatic width, 59; length of upper molar series, 21; 

 length of mandible, 55 ; length of lower molar series, 26. Vertebrae : 

 Cervical, 7 ; Dorsal, 14 ; Lumbar, 5 ; Sacral, 3 ; Caudal, 26. 



The general appearance of this monkey is that of a reddish brown 

 animal with yellowish shoulders and upper arms, and a black head 

 with two tufts or horns upstanding, one on each side. If is, however, 

 subject to great variation, to such an extent at times, that it would 

 seem most improbable that the various styles should represent the 

 same species. It is practically impossible to work out the synonymy 

 of this variable species with any degree of accuracy, since the name 

 fatuellus has been given to various Capuchins from numerous locali- 

 ties in which the true fatuellus has never been found. It has been 

 attributed to the Guianas, but the writer has not seen an authentic 

 specimen from that part of South America. Wied, (1. c.) calls the 

 Capuchin from the Province of Rio de Janeiro this species, but his 

 animal is the C. cirrifer Geoff. The descriptions of the earlier Authors 

 are often so brief and unsatisfactory that it is frequently impossible to 

 determine what species it is to which they refer, and there is so much 



