MIDAS. CEBIDA:. ALOUATTINZA:, 725 
Genl. Char. Size small; nape rufous; no lengthened white oc- 
cipital crest. 
Color. Top of head white, rest of head and face lead color; nape 
and hind neck rufous, upper parts and sides yellowish brown, becom- 
ing rufous on rump; under parts, limbs, hands, and feet white; tail, 
basal portion rufous, remainder black. 
Measurements. Total length, 570; tail vertebra, 310 (mounted 
specimen), Skull: occipito-nasal length, 59; zygomatic width, 38; 
width of orbit, 17.5; length of nasals, 10; width of frontals, 26; palatal 
length, 16; palatal arch to end of hamular process, 10; width of ham- 
ular process, 9; length of mandible, 37; height at condyle, 22.5. 
In the next family are found the typical members. They are 
inhabitants of tropical America, in whose vast forest regions they 
abound, Brazil probably possessing the largest number of species. 
Those of the genus Cesus, known as the Sapajous or Capuchins, are 
probably familiar to a greater number of people than any other of 
the monkey tribe, and are more often seen in captivity. They are 
among the most intelligent of the New World Monkeys, are playful, 
mischievous in the highest degree, and tricky. They go in troupes, 
following each other in single file through the forest trees, steadying 
themselves amid the branches by hands and tail, taking a firm hold 
of any object with the latter by means of the prehensile end. 
‘am. Il. Cebidze. Prehensile-tailed Monkeys. 
Skull round; no external auditory meatus; frontal sinuses large; 
internarial septum broad; legs, arms, and tail very long; tail some- 
times prehensile; nails on all the digits. 
Subfam. |. Alouattinee. 
Digits with nails; tail prehensile, naked distally beneath; pollex 
well developed. 
The Howling Monkeys, as the species of the next genus are called, 
are remarkable, as may be supposed from their names, for their 
extremely powerful voices, which cause the forest to resound with 
their cries in the mornings and evenings. They are heavy in form, 
with strong prehensile tails, sullen in disposition, and practically 
untamable. They keep in the tops of the highest trees, and feed on 
