22 NATURAL HISTORY. 



possess an enlargement in the throat, which renders their cry 

 exceedingly loud and mournful. They howl in concert, prin- 

 cipally at the rising and setting of the sun ; one monkey 

 begins the cry, which is gradually taken up by the rest, 

 precisely as may be observed in a colony of rooks. They are 

 in great request among the natives as articles of food, their 

 slow habits rendering them an easy prey. 



The Ursine Howler, or Araguato, is common in Brazil, 

 where forty or fifty have been observed on one tree. They 

 generally travel in files, an old monkey taking the lead, and 

 the others following in due order. They feed principally on 

 leaves and fruit ; the tail is prehensile like that of the Spider 

 Monkeys. 



The genus Cebus is omitted. 



CALLITHIUX. (Gr. /vaAor, beautiful; Opt%, hair.) 



Torquatus (Lat. torquis, a necklace Collared), the Collared Tee Tee. 



The beautiful little animals here represented belong to the 

 Squirrel Monkeys, so called on account of their large bushy 

 tails. 



The COLLARED TEE TEE, or White-throated Squirrel Monkey, 

 is founl to the east of the Orinoco. It lives on small birds, 



