106 
VERTEBRATA. 
THE COLLARED TEK-TliE, OR CALLITHRIX. 
parts of tropical South America. They are generally about twelve or fourteen inches in length, 
and bear a great resemblance to each other. 
Genus CALLITHRIX, CallUhrix. — The monkeys of this genus are called Sajous by some 
authors. Several of the species are also called Ti-ti, or Tee-tee. They are found in Brazil and the 
vicinity. They have thick fur, and a long tail entirely covered with hair, but not highly prehen- 
sile. In size, and also in general character, they resemble the sajous. 
The OuAPPO, or Ouapoussa, C. discolor, is found on the borders of the Amazon and in Peru. 
Its color is of a reddish gray, spotted with maroon. In running about among the branches of the 
trees, they display, admirable grace and agility. The females carry their young ones on their 
backs, and even thus encumbered seem to have the lightness of birds. During the day they 
- remain rolled up in balls, nttering from time to time a kind of internal cry, whence they are called 
Vcntriloquial Monkeys and Singing Monkeys. When evening comes they resume their activity, 
and go forth to obtain their food, which consists of fruits and insects. They are gentle, but not 
very intelligent. They readily submit to domestication, in which state they eat cooked meats, 
sweetmeats, and other food. 
The other species of callithrix are the 0. amictus ; the Collared Callithrix, C, torquatus; 
the Masked Callithrix, C. j^^^'sonatus ; C.gigo; the Black-handed Callithrix, C, melanochir ; 
the Mitred Callithrix, C. infulatm ; 0. donacophilus, C. moloch, and G. cupreus. 
G-enus SAIMIRI, Saimiris. — The animals of this genus are but about ten inches in length, and 
are the most slender, graceful, and interesting of the Avhole monkey family. The large develop- 
ment of the brain is one of their most striking charactei'istics. The tail is but slightly prehensile, 
yet is used in climbing trees. Humboldt tells us they are very sympathetic, and that when they 
have any cause of sadness their eyes fill with tears. When a person is talking to them, they 
seem greatly interested, and try to seize the Avords as they issue from the mouth. They recognize 
the objects represented by engravings, as fruits and insects, and approach and attempt to seiz 
