734 : ATELES. 
hairs on forehead; tail tinged with buff on upper part. This is the 
A. melanochir style. Darker style has the body above and below, 
back of thighs, and base of tail rusty red; hands, feet, tail, except 
base, arms, fore part of hind legs, and lower part of shoulder black; 
face black; whiskers buffy; top of head blackish, with a buff spot on 
forehead. 
Measurements. Total length, 950; tail, 525. 
686. rufiventris (Afeles), Sclat., Proc. Zodl. Soc., 1872, p. 688, pl. 
LVII, juv. 
FULVOUS-BELLIED SPIDER MONKEY. 
Type locality. Colon. Atrato River, northern Colombia. 
Geogr. Distr. Panama?’ into Colombia, South America. 
Genl. Char. Hair rough, upstanding, projecting on forehead; no 
external thumbs. 
Color. Face and muzzle flesh color; belly deep fulvous, rest of 
pelage black. 
Measurements. The type was an immature individual. 
687. ater (Aieles), F. Cuv., Hist. Nat. Mamm., ead ed., 11, 1823, 
Livr, XEXKIX, pr To7sjale 156: 
BLACK SPIDER MONKEY. 
Type locality. Cayenne, French Guiana. 
Geogr. Distr. Panama to eastern Peru. 
Color. Black; upper part of back brownish, lower part and sides 
fulvous; under parts and inner sides of limbs white; tail black. 
Measurements. Total length, 875; tail, 475. 
688. grisescens (Ateles), Gray, Proc. Zodl. Soc., 1865, p. 732. 
GRIZZLED SPIDER MONKEY. 
Type locality. Unknown. Type specimen in British Museum. 
Geogr. Distr. Central America. 
Genl. Char. Fur moderately long; no thumb. 
Color. ‘‘Fur moderately long, black, with many silvery white 
hairs interspersed; tail black; under side grayish; hair of the fore- 
head moderately long.”’ (Gray, 1. c.) 
Top of head, nape, back of neck, fore part of shoulders, arms, 
hands, legs, and feet black; rest of body and limbs silvery gray mixed 
with black hairs; tail silvery gray mixed with black hairs like back, 
tip black; face black. (Specimen in Collection of Am. Mus. Nat. 
Hist., New York.) 
Measurements. Total length, 1265; tail vertebrae, 775; hind feet, 
170. (Mounted Specimen, A. M. N. H., N. Y.) 
