MIDAS. CEBIDJE. ALOUATTINiE. 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 vertebrae, 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 CEBUS, 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. 



Fam. II. Cebitke. 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. I. Alouattinse. 



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 



