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 torguatus, Hoffm., Mag. Ges. Nat. Freund. Berlin, x. 
p. 86 (1807). 
Simia lugens, Humb., Obs. Zool., i., p. 319 (1811). 
’ 
Callithrix lugens, Geoffr., Ann. Mus., xix., p. 113 (1812). 
Saguinus vidua, Lesson, Species Mamm. Bimanes et Quad- 
rum., p. 165 (1840). 
Caliithrix torquatus, Geoffr., t. c. p. 114; Gray, Cat. Monkeys 
Brit. Wus:,. p55: (1879). 
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. 
