Chapter XXXV: The Black-Footed Guenon. Cercopithecus Nigripes

_Cercopithecus nigripes_, Du Chaillu, Pr. Bost. N. H. Soc., vii., p. 360
(1860); Gray, P. Z. S., 1868, p. 182; Scl., P. Z. S., 1893, p. 254.

_Cercopithecus erxlebenii_, var. _nigripes_, Gray, Cat. Monkeys Brit.
Mus., p. 23 (1870).

_Cercopithecus pogonias_, Schlegel, Mus. Pays-Bas, vii., p. 182 (1876).

CHARACTERS.--Very similar to _C. pogonias_, but differs in being darker, and in having the dorsal stripe wider and more diffused lower down. It is probably only a variety of the preceding.

DISTRIBUTION.--Gaboon, where it was discovered by Du Chaillu.

{79}XXXVI. WOLF'S GUENON. CERCOPITHECUS WOLFI.

_Cercopithecus wolfi_, Meyer, Notes, Leyden Mus., xiii., p. 63 (1891);
id., P. Z. S., 1894, p. 83, pl. vii.; Sclater, P. Z. S, 1893, p. 258.

CHARACTERS.--Face, except the lips, which are flesh-colour, and the temples, greyish-black; a yellowish-white bar across the forehead from ear to ear; whiskers greyish-yellow; ear-tufts reddish-brown; upper surface dark slate-grey; sides blue-grey, the hairs barred with several pale rings, and tipped with black; dorsal stripe, narrowing towards the tail, olive-yellowish, brighter on the crown, and brownish-yellow towards the tail; basal half of the tail above, ashy-grey, below white; an orange-yellow patch on the sides; chin, sides of neck, under surface of body and inner side of limbs white; belly washed slightly with orange; shoulders and outer aspect of the fore-limb, black--the hairs ringed with grey; on the hinder edge of the fore-arms an ochre-coloured stripe; outer side of thighs and legs bright red-brown, becoming orange on their anterior and posterior internal margin. Length of body, 18¼ inches; of tail, 24 inches.

DISTRIBUTION.--West Africa: the exact locality is unknown.

VI. CERCOPITHECI BARBATI.

The members of this group are distinguished by possessing a beard and a frontal crest.