XXXI. SCHLEGEL'S GUENON. CERCOPITHECUS NEGLECTUS.
_Cercopithecus leucocampyx_ (nec Fischer), Gray, Cat. Monkeys Brit. Mus., p. 22 (1870).
_Cercopithecus neglectus_, Schlegel, Mus. Pays-Bas, vii., p. 70 (1876); Giglioli, Zool. Anz., x., p. 510 (1887); Scl., P. Z. S., 1893, p. 253.
CHARACTERS.--General colour greyish-brown, finely grizzled; under side of body black; crown, outside of limbs and base of tail black; anterior aspect of thighs and a band across the haunches white.
Distinguished from the true _C. leucampyx_ by the colour of the front of the thighs, and by its banded haunch.
_Distribution._--The White Nile, where it was obtained by Consul Petherick.
XXXII. THE DIADEM GUENON. CERCOPITHECUS LEUCAMPYX.
_Simia leucampyx_, Fischer, Syn. Mamm., p. 20 (1829).
{ 76}_Le Diane femelle_, F. Cuv., Hist. Nat., Mamm., livr. xlii. (June, 1824).
_Cercopithecus diadematus_, Geoffr. in Bélang., Voy. Zool. p. 51 (1834).
_Cercopithecus leucampyx_, Martin, Mamm. An., p. 529 (1841); Geoffr., Dict. Univ. Hist. Nat., iii., p. 304 (1849); Schl., Mus. Pays-Bas, vii., p. 83 (1876); Giglioli, Zool. Anz., x., p. 510 (1887); Sclater, P. Z. S., 1893, p. 253 ([female]).
_Cercopithecus pluto_, Gray, P. Z. S., 1848, p. 56, pl. iii.; 1868, p. 182; id., Cat. Monkeys Brit. Mus., p. 23 (1870); Wagner in Schreb. Säugeth. Suppl., v., p. 48 (1855); Sclater, P. Z. S., 1870, p. 670, 1871, p. 36, 1892, p. 97.
CHARACTERS.--Face, nose, and lips black; whiskers rounded and bushy; no beard; fur long and harsh; form robust and powerful; whiskers grizzled, the hairs ringed with black and white; across the forehead, over the eyes, a broad white bar (or diadem); the back beyond the shoulders, the sides and haunches, and the posterior aspect of the thighs, grizzly-grey, the hairs ringed with numerous greenish-white and black bars; tail grey at its base, rest black; a few yellowish hairs on the callosities, but all the rest of the body deep black. Length of body, 23 inches; of tail, 21.
DISTRIBUTION.--West Africa: Angola, and the Congo, to Nyasa Land.
The following three species form the fifth group of the Guenons, distinguished by their yellowish or rufous ear-tufts, and the three black lines over the forehead.
{ 77}XXXIII. ERXLEBEN'S GUENON. CERCOPITHECUS GRAYI.