THE TITI MONKEYS. 159 



The Titi Monkeys are diurnal animals, arboreal and gre- 

 garious, very lively in disposition, noisy and agile, living on 

 fruit, insects, birds' eggs, and even small birds. They range 

 all over South America, from Panama to the southern limits 

 of the forest regions. 



I. THE WHITE-COLLARED TITI. CALLITHRIX TORQUATA. 



Cebus torquatus, Hoffm., Mag. Ges. Nat. Freund. Berlin, x., 

 p. 86 (1807). 



Simia tugens, Humb., Obs. Zool., i., p. 319 (1811). 



Callithrix Zugens, Geoffr., Ann. Mus., xix., p. 113 (1812). 



Saguinus vidua, Lesson, Species Mamm. Bimanes et Quad- 

 rum., p. 165 (1840). 



Callithrix torquatus, Geoffr., t. c. p. 114; Gray, Cat. Monkeys 

 Brit. Mus., p. 55 (1870). 



Callithrix torquata, Schleg., Mus. Pays Bas, vii., p. 235 

 (1876). 



Characters. Head round ; face short ; ears short, nearly 

 naked ; nose flat. Fur soft and woolly, intermixed with many 

 long, stiff, dark reddish-brown hairs, the hairs red at the base, 

 and black at the tips; forehead black; crown of head dark 

 brown ; a narrow band round the face, white ; a narrow collar 

 round the neck, reddish-white ; hands white ; hair of feet red 

 at the base, but black at the tips. Length of the body, about 

 12 inches. 



Distribution. Confined to the upper reaches of the Rio 

 Negro, Brazil. 



Habits. This species, often known under the name of the 

 Widow Monkey, is said to be very gentle in disposition. 



