112 CEBUS 



Genl. Char. Hair on forehead long, upright in tufts. 



Color. Middle of forehead between eyes, top and back of head 

 black, the hairs reddish brown at base; sides of forehead over eyes 

 and continuing in a narrow line on sides of head to angle of mouth, 

 including lower part of cheeks, pale yellow ; behind this a blackish 

 brown band extends from the top of head passing in front of ears and 

 covering whiskers and meeting under the chin ; sides of neck grayish 

 brown ; a narrow line on back of neck, entire upper parts of 

 body, flanks and arms to elbow bright golden brown tinged with red ; 

 forearms black, hairs tipped with grayish brown ; hands brownish 

 black; legs dark chestnut red; feet, blackish brown; the ochraceous 

 rufous on base of hairs showing on forearms and legs giving them a 

 mottled appearance ; under parts of body pale yellow, as is also the 

 inner side of arms above elbow ; inner side of forearms and legs, black ; 

 tail black with a purple gloss, reddish hairs mixed with the black at 

 base. Ex type in Paris Museum. 



Measurements. In size equal to C. apella (Linn.). Skull in 

 type specimen. 



The unique type of this specimen is unlike any example of Cebus 

 I have ever seen. The entire upper part of the body and arms above 

 elbows are chestnut red, a distribution of this color no other species 

 possesses. It is most closely allied to C. apella, but the hair on the 

 head is longer and the specimen is strikingly different in the color of 

 the body. I have no other alternative than to consider this example as 

 representing a distinct species, for though mindful of the great varia- 

 tion existing in the colors of various species of Cebus, there is none 

 known to me to which this specimen can be assigned. A specimen 

 procured by Natterer on the Rio Negro, in the Vienna Museum, resem- 

 bles somewhat the type of C. crassiceps, differing in not having the 

 sides of neck grayish brown, this part being reddish, and the base of 

 hairs on forearms and legs are black like the rest and not ochraceous 

 rufous, and under parts of body are pale yellowish red, not pale 

 yellow. Nevertheless it has a general resemblance to C. crassiceps, but 

 is not so red. 



Cebus caxiginosus Elliot. 



Cebus caliginosus Elliot, Ann. Mag. Nat. Hist., V, 1910, 5th Ser., 



p. 78. 

 Type locality. St. Catarina, Sao Paulo, Brazil. Type in British 

 Museum. 



