CALLICEBUS 247 



Color. Face black ; forehead white or grayish white ; top of head 

 iron gray ; sides of head, throat, and under parts, chestnut red ; lower 

 part of outer and inner side of limbs, hands and feet, chestnut red; 

 the upper part of limbs iron gray ; tail black with gray mixed, remain- 

 der silvery gray ; hair on ears grayish white. 



Measurements. Size of C. cupreus. Skull : occipito-nasal length, 

 56 ; zygomatic width, 37 ; intertemporal width, 29 ; palatal length, 28 ; 

 width of braincase, 33; median length of nasals, 7; length of upper 

 molar series, 14 ; length of mandible, 38 ; length of lower molar series, 

 15. Example in British Museum. 



Callicebtjs stjbruttts Elliot. 



Callicebus subrufus Elliot, Ann. Mag. Nat. Hist., XX, 1907, 7th 

 Ser., p. 192. 



Type locality. Pachite, Ucayali River, Peru. Altitude between 

 400 and 500 feet. Type in British Museum. 



Genl. Char. Allied to C. leucometopa, but color entirely different. 



Color. Face black; a narrow black bar on forehead above eyes, 

 succeeded by a broader white one ; rest of head on top, neck and entire 

 upper parts bright russet, becoming darker and more reddish on the 

 rump, the hairs being slate at base, then alternately ringed with slate 

 and bright russet, or on the rump with slate and dark russet or 

 reddish ; arms to elbows, and thighs to knees, rest of outer side of limbs, 

 hands and feet bright chestnut red; side of face, whiskers, inner side 

 of limbs, throat, chest, and middle of abdomen bright chestnut red; 

 fingers and toes yellowish gray; tail, basal third black, with chestnut 

 hair mixed with black at the root, remainder light gray above, nearly 

 whitish beneath ; hairs on ears white. Ex type British Museum. 



Measurements. Size about equal to that of C. leucometopa. 

 Skull: occipito-nasal length, 51; Hensel, 40; zygomatic width, 35; 

 intertemporal width, 29 ; palatal length, 18 ; breadth of braincase, 33 ; 

 median length of nasals, 6? (broken) ; length of upper molar series, 

 15 ; length of mandible, 35 ; length of lower molar series, 16. Ex type 

 British Museum. 



While allied to C. leucometopa the great difference the present 

 animal exhibits in its coloration makes it easily recognizable. In its 

 gray fingers and toes it shows a leaning towards C. ornatus, but in 

 other respects it has no resemblance to that species. The unique 

 example in the Collection of the British Museum is fully adult, but 

 not old. 



