xvi Quadkumana. MAMMALIA. Quadbtjmana. 
Tribe IV.— OALLITETOHINA. 
This tribe includes forms that have the molar teeth 
f, with blunt tubercles. The canines are moderately 
long. The cutting-teeth are erect, in a regular series 
with the canines. The head is rounded. The lower 
jaw dilated behind. Eyes are moderate in size. 'J'heir 
habits are diurnal. The nostrils are situated far apart, 
laterally, and the tail is very long, lax and straight. 
The term Callithrix, which means “beautiful hair,” 
is applied to several species in this tribe from their 
having a remarkably fine fur. 
Chrysotheix. 
This genus indicates by its name, that some of the 
species are golden in color. The fur is soft, close, 
erect. 'J'he tail is cylindrical, elongate, and covered 
with short hair ;• the end being rather tufted, and 
slightly prehensile. The septum of the nose is very 
broad. The lower jaw narrow behind. The eyes and 
ears are large. 'J’he skull is very much elongated, 
and very large behind. 'I'he septum of the orbit is 
membraneous. Spinous processes of the lumbar ver- 
tebra are trapezoid. 
'I’he Monkeys of this genus are called Squirrel 
Monkeys on account of their peculiar movements and 
slender forms. 'J'hey are gentle, timid, yet active lit- 
tle creatwres. 'I’hey are found in the tropical forests 
from Costa Rica to Bolivia. 
THE TEE-TEE [Ghrysothrix sciurens ) — Plate 3, 
fig. 8.- — 'J’hese little Monkeys are characterized by a 
coat of extreme beauty. 'J’he specific name of the 
present one is derived from the resemblance of the 
kind to a Squirrel ; its general appearance and habits 
reminding one of the latter. The Tee-tee is found in 
great numbers in Brazil, where it is called Saimiri. 
It is long and slender in body, with a tail equally so, 
that is about ten inches. The latter is more like 
that of a Rat than the usual form of its race. The 
intelligence of this little creature is quite surprising ; 
this, with its extremely gentle disposition, and almost 
entire freedom from bad habits, renders it a favorite 
pet. It has a curious habit of watching the lips of 
persons who speak to it, as if it strove to understand 
what is said. 'I’he fur of the Tee-tee is of a rich olive 
tint, with golden reflections, 'riie ears are white ; the 
under surface a whitish gray ; the tip of the tail 
black. Two varieties of the Tee-tee are mentioned ; 
one with the back gray-punctated, and another with 
the back washed with golden yellow. 
THE SHORT-TAILED TEE-TEE ((7Ary,?o?Aria! ws<Ms) 
has gray fur, minutely punctated with black, 'fhe 
back is golden-washed,the hairs being a pale reddish- 
yellow, with minute black tips. The outer sides of 
the fore-arms are like the rest of the body. The tail 
is short, thick, and black-tipped. The face is whitish. 
One variety has the outer side of the fore-arm golden ; 
while another has the same part of the fore-arm 
colored like the rest of the body. 
THE BLACK-HEADED TEE-TEE [Ghrysothrix en- 
iomophagus ). — The fur is golden brown. The hairs 
of the back black, with long, yellow tips. The outer 
side of the thighs and shoulders closely punctated 
with black. The upper part, and the head and tail, 
black. The face, throat and inside of thighs, yellow- 
ish-gray. The ears are hairy, and the tail moderately 
long. A variety has the upper part of the head yel- 
lowish, with more or less long black tips to the hair, 
making the fur more or less deep black. Habitat of 
both, Bolivia. This and C. ustus are larger than G. 
sciureus. 
Callithrix. 
This genus is characterized by having the tail cov- 
ered with short hairs ; septum of the nose nearly as 
broad as the cutting-teeth ; ears large. Spinous pro- 
cesses of lumbar vertebrae acute, triangular, nearly 
incumbent. 'I’hey are diurnal in habit, gregarious, 
lively, agile, living on fruit, insects and birds’ eggs. 
THE RED TEE-TEE {GallitTirix cupren) is dark 
black and gray-grizzled. Its cheek, throat, hands, 
feet, legs and under side of body, dark red bay. 'I’he 
tail is like the back, but rather darker. 'I’he hairs of 
the tail are dark gray, with a broad, subterminal 
black band. 'I’he eyebrows are black. A variety has 
white at the end of the tail. Habitat Brazil. 
THE WHITE-CHESTED TEE-TEE [Callithrix am- 
ietus). — The back is reddish-washed, the hairs being 
black at the base. On the chest is a pure white spot. 
Hands are white ; feet are black ; forehead and tail 
black ; hairs of the tail black at the base. It is the 
Simla amieta of Humboldt. Habitat Guiana. 
THE COLLARED TEE-TEE [Callithrix torquatus) 
is a dark reddish-brown ; the hairs are red below, 
with black tips ; dark crown ; the narrow margin to 
the face, white ; hands, white ; feet and tail, black ; 
the hair of the latter red at the lower part ; the fore- 
head is black. Habitat Brazil. 
THE REED TEE-TEE [Callithrix donacophilus ). — 
'riie fur of this species is a pale gray, or reddish-black 
gray. The chest and belly, gray or reddish-gray ; the 
tail, pale ; hairs of the tail gray, with dark tips. 
'I’he hands and feet are gray, like the back. Three 
varieties are mentioned. Habitat Bolivia. 
THE ORABASSD [Callithrix moloch). fur is 
dark gray, black and red-grizzled, 'fhe cheeks, chest 
and belly are red. 'i’he hands and feet are dark gray. 
Inhabits Brazil. 
THE BRIGHT ORABASSU [Callithrix ornatm) is 
black and gray-grizzled ; its forehead and ears are 
white ; its temples, cheeks, throat, under side of body, 
and inner side of legs, bright red chestnut. 'I’he hands 
and feet are gray ; the tail, blackish-gray washed. 
'I’he hairs of the tail are pale, with a broad subter- 
minal ring. Inhabits Hew Grenada. Merreaux has 
described it as C. discolor. 
THE MASKED TEE-TEE [GoXlithrix personalus ). — 
The fur is black-grizzled ; the hairs are long and black- 
ish, with narrow gray rings. The chest and beneath, 
blackish-ashy ; forehead, cheeks, whiskers, hands, feet 
and lower part of the legs, black ; tail, blackish-ashy ; 
hair near the base, reddish ; of the lower half of the 
end, one-colored gray. 'I’wo varieties are noted. 
Found in Brazil by Lord Stuart de Rothsay. 
