_Semnopithecus albogularis_, Sykes, P. Z. S., 1831, p. 106.
_Cercopithecus albigularis_, Sykes, P. Z. S., 1832, p. 18; Owen, P. Z.
S., 1832, p. 18 (anatomy); Martin, Mamm. An., p. 512 (1841); Frazer,
Zool. Typ., pl. ii. (1848); Wagner in Schreb. Säugeth. Suppl., v., p. 45
(1855); Gray, Cat. Monkeys Brit. Mus., p. 24 (1870); Schleg., Mus.
Pays-Bas, vii., p. 79 (1876); True. Pr. U. S. Nat. Mus., xv., p. 448
(1893); Sclater, P. Z. S., 1893, p. 251; Matschie, S.B., Nat. Fr. Berl.,
1893, p. 215; Thomas, P. Z. S., 1894, p. 137.
_Cercopithecus erythrarchus_, Peters, Reis. Mossamb. Säugeth., p. 1, pl.
i.; Schl., Mus. Pays-Bas, vii., p. 77 (1876); Kirk, P. Z. S., 1864, p.
649; Reuvens, Zool. Gart., xxx., p. 207 (1889); Oudem, _op. cit._, xxxi.,
p. 267 (1890); Scl., P. Z. S., 1893, p. 249 (female).
_? Cercopithecus monoides_, Geoffr., Arch. du Mus., ii., p. 558, pl. 31
(1841); id., C. R., xv., p. 1038 (1842); id., Dict. Hist. Nat., iii., p.
303 (1849); Scl., P. Z. S., 1893, p. 256.
{68}CHARACTERS.--MALE.--Head rounded, short; ears small, rounded, and
nearly concealed in the long fur of the head; eyes deep-set; superciliary
hairs long; whiskers thick and bushy; no beard; facial angle large;
cheek-pouches small but distinct, not observable even when filled, being
concealed by the bushy whiskers; thumbs short; great-toes long; very small
callosities; tail half as long as the body. Larynx with the usual two wide
lateral sacs and a middle pouch extending forward about three inches under
the skin of the neck, communicating with the larynx by a large opening.
Entire upper surface black, mixed with yellow,--the hairs being black,
ringed with brownish-yellow bars. Face, cheeks, and lips black; shoulders,
fore-limbs and hind-limbs (washed with yellowish), black, from the absence
of the yellow bars, which predominate on the back and sides; under side of
the body black, speckled with white; chin and throat white; no white thigh
patches; tail, black.
FEMALE.--Differs from the male in being smaller, and in having the rump,
the upper and lower sides of the base of the tail, the region round the
anus, and the posterior aspect of the upper part of the thighs and arms
strongly tinged with reddish-brown. The lower side of the body and inner
sides of the limbs whitish--the hairs towards their extremities being
ringed with black and greyish-yellow. It has been described as
_Cercopithecus erythrarchus_ of Peters and other writers.
DISTRIBUTION.--West Africa: Gold Coast (_Pel_); also said to have been
obtained on the Congo. East Africa: Mozambique; believed to abound about
Cape Corrientes (_Peters_). Quilimane and the Lower Zambesi are further
given as habitats both by Dr. Peters and Sir J. Kirk. Mr. H. H. Johnston,
H.M. Commissioner in Nyasa Land, has sent it from the Milanji Plateau,
where it ranges from 3,000 to 6,000 feet above the sea. This species was at
one time supposed, but quite erroneously, to come from Madagascar.