THE HOWLERS. 197 
Distribution.—This is the species of Howler which ranges 
furthest to the south. It occurs most abundantly in Southern 
Brazil, Paraguay, and Bolivia, but Mr. Bates records his having 
obtained a specimen at Villa Nova, on the Upper Amazons, 
which had come from above Borba, on the Rio Madeira. 
He did not, however, meet with it on any other part of the 
Amazon region. Mr. Graham Kerr saw it in troops on the 
banks of the Pilcomayo river. 
Habits. — Like nearly all the Howlers, the present species is 
of a sulky disposition, in captivity slinking away out of sight 
when approached. The members of this genus are the only 
Monkeys which the Indians have not succeeded in taming. 
They rarely survive their captivity many weeks. 
Ill. THE YELLOW-HANDED HOWLER. ALOUATTA BEELZERUL. 
Simia beelzebul, Linn., Syst. Nat., 1., p. 37 (1766). 
Mycetes rufimanus, Kuhl, Beitr. Zool., p. 31 (1820). 
Mycetes discolor, Spix, Sim. et Vespert., Bras., p. 48, pl. xxxiv. 
(1823). 
? Colobus chrysurus, Gray, Ann. Nat. Hist., xvii., p. 77 (1866). 
Mycetes beelzebul, Gray, Cat. Monkeys Brit. Mus., p. 41 (1870) ; 
Schl., Mus. Pays Bas, p. 150 (1876). 
Characters.— Black, slightly washed with yellow on the under 
side of the body and inner side of the limbs; hairs of the 
body soft, brown at the roots, black at the tips; hands and feet 
variable, reddish-yellow or reddish-brown, or grey, or black. 
Upper surface and tip of the tail, spot in front of the ears, 
and on the knees, reddish-yellow. Length of the body, 1714 
inches ; tail, 18% inches. 
This species differs from the Black Howler (A. xzigrva) by the 
