198 ALLENS NATURALISTS LIBKARY. 
brown colour of the roots of the hair; and from the species 
next to be described—the Brown Howler (4. urszna}-—by the 
length of the fur and the absence of the reddish-brown tips to 
the hairs. 
Distribution.—Apparently confined to the Lower Amazon, in 
the vicinity of Para. 
Habits—The same as those of the species already described. 
IV.. THE BROWN HOWLER. ALOUATTA URSINA. 
Stentor ursina, Humb. and Bonpl., Obs. Zool., i., pl. 30 (fig. 
nec deser.’; 1822). 
Stentor flavicauda, Id. t. c. p. 355 (1811). 
Stentor ursinus, Geoffr., Ann. Mus., xix., p. 108 (1812). 
Stentor fuscus, Geoffr., t. c. p. 108 (1812). 
Mycetes fuscus, Kuhl, Beitr. Zool., p. 29 (1820) ; Spix, Sim. et 
Vespert., Bras., p. 43, pl. 30 (1823). 
Mycetes bicolor, Gray, Ann. N.H., xvi., p. 214 (1845); id. Cat. 
Monkeys Brit. Mus., p. 40 (1870). 
Mycetes ursinus, Is. Geoffr., Cat. Méth. Primates, p. 55 (part., 
1851); Gray, Cat. Monkeys Brit. Mus., p. 39 (1870); 
Schl., Mus. Pays Bas, vil., p. 155 (1876). 
Aluatta ursina, Slack, Proc. Acad. Nat. Sci. Philad., 1862, 
Dp. 57: 
Mycetes flavicauda, Schl., t. c. p. 147 (part., 1876). 
Characters.—General colour shining yellowish-red, or dark 
brownish-yellow ; hairs rather rigid, black with yellowish tips ; 
hairs of the shoulder ringed with black. When half-grown the 
limbs and tail are very dark brown, nearly black ; tail shorter 
than the body, olive black, with two yellow lateral stripes. 
Length of the body, 23 inches ; of the tail, 22 inches. 
