_Cercopithecus tantalus_, Ogilby, P. Z. S., 1841, p. 33; Sclater, P. Z.
S., 1893, p. 258; Schl., Mus. Pays-Bas, vii., p. 73 (1876).
_Cercocebus tantalus_, var. f., Gray, Cat. Monkeys Brit. Mus., p. 26
(1870).
CHARACTERS.--Head rounder and face shorter than in _C. callitrichus_. Face
covered with very short hairs; nose prominent, and narrow between the eyes,
flatter and broader towards the tip. Head, back, and sides, a mixture of
yellowish-brown and green, of the same shade as prevails in the upper parts
of _C. callitrichus_ and _C. pygerythrus_; outer surface of the limbs
clearer ashy-grey; whiskers, throat, breast, under side of the body, and
inner side of the limbs, yellowish-white; tail brown at the root, pale grey
at the tip; back of hands and feet light grey; face livid flesh-colour
round the eyes, the short hairs on the nose and cheeks black; lips light
brown; eyebrows black, surmounted by a broad white band across the
forehead; scrotal region covered with yellowish hairs. (_Ogilby._)
DISTRIBUTION.--Africa, but the exact habitat is unknown.
HABITS.--Unknown.
{63}III. CERCOPITHECI ERYTHRONOTI.
The next three species constitute the red-furred group of Geoffroy and
Sclater, being bright rufous above, and white beneath.