The species which we now proceed to describe belong to Prof. Schlegel's Section v., and Dr. Sclater's Cercopitheci melanochiri, of which the members have the arms and legs either black or dark grey, and have a black band from the outer corner of the eyes to the ears.
XXII. THE MONA GUENON. CERCOPITHECUS MONA.
Simia mona, Schreber, Säugeth., i., p. 97, pl. xv. (1775).
Cercopithecus mona, Erxleb. Syst. Regne An., p. 32 (1777); Geoffr., Dict. Hist. Nat., p. 304 (1849); Martin, Mammif. An., p. 527 (1841); Wagner, in Schreb. Säugeth. Suppl., v., p. 47 (1855); Gray, Cat. Monkeys Brit. Mus., p. 22 (1870); Schleg., Mus. Pays-Bas, vii., p. 80 (1876); Sclater, P. Z. S., 1893, p. 250.
La mone, F. Cuvier, Hist. Nat. Mamm., i., livr. ix. (Août, 1819).
Characters.—Top of the head brilliant golden-green, the hairs being black at the roots, yellow further up and tipped with black; back, sides of body, shoulders, and haunches chestnut-brown, speckled with black,—the hairs being grey at the base, ringed alternately with red, or brown and black; frontal band pale greenish; rump, with the exception of a distinctive elliptical white bar on each side, at the base of the tail, black; the hands and feet, and external aspect of the legs, thighs, and fore-arms, black; the under side of the body and inner side of the limbs pure white, separated by an abrupt line from the colours of the outer surfaces; the transverse black band above the eyebrows extending from the outer corner of the eyes to the ears; nude parts of face, ears, and hands livid flesh-colour; the whiskers bushy, covering much of the cheeks, descending on the sides and lower part of the neck, pale yellow, speckled with black marks.
The white bars on each side of the tail, on the rump, and the white frontal band distinguish this species from all others.
Distribution.—West Africa: Cameroons.
XXIII. SYKES' GUENON. CERCOPITHECUS ALBIGULARIS.
Semnopithecus albogularis, Sykes, P. Z. S., 1831, p. 106.