_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.