THE HOWLERS. 193 
Alouatta seniculus, Lacép., Mém. de VInst., iii., p. 489 (1800). 
Stentor ursina (nec fig.), Humb. and Bonpl., Obs. Zool., v., 
P- 354 (1813). 
Iyeetes seniculus, Wlig., Prod. Syst. Mamm., p. 70 (1811) ; 
Geoffr., Cat. Méth. Primates, p. 52 (1851); Schl., Mus. 
Pays Bas, vii., p. 156 (1876) ; Gray, Cat. Monkeys Brit. 
Mus., p. 39 (1870, part.). 
Stentor seniculus, Geoffr., Ann. Mus., xix., p. 108 (1812). 
Mycetes stramineus, Spix, Sim. et Vespert., Bras., p. 45, pl. 31 
(1823 ; nec Geoffr.). 
Mycetes chrysurus, Geoffr., Mém. Mus., xvii., p. 66 (1829). 
Mycetes auratus, Gray, Ann. N. H., xvi., p. 220 (1845) ; id. 
Cat. Monkeys Brit. Mus., p. 40 (1870). 
Mycetes laniger, Gray, Ann. N. H., xvi, p. 219 (1845); id. 
Cat. Monkeys Brit. Mus., p. 4o. 
Aluatta senicula, Slack, Proc. Acad. Nat. Sci. Philad., 1862, 
Bes 7: 
(Piate XVI/T,) 
Characters—Head, neck, limbs and tail, dark chestnut- 
brown ; back and sides golden-yellow ; beard in the full-grown 
male long, the hair golden-yellow at the root, otherwise chest- 
nut-brown ; face naked, black; chest naked, the abdomen 
sparsely covered with long brown hairs. 
The hair of the body is soft. The tail varies in colour in 
individual specimens, being sometimes, at its termination, of 
the same colour as the back, and sometimes bright golden- 
yellow. The mamme are occasionally situated in the axi//e 
(or arm-pits). Length of body, 19% inches ; tail, 20 inches. 
Young.—Of the same colour as the parents, only a little darker, 
the hair hard and rigid. 
3-V.1 2) 
