22 SIMIADA. 
side of the tail red bay; face, temples, and limbs black ; cheeks 
white. 
Cercopithecus erythrotis, Waterhouse, P. Z. S, 1838, p. 59 ! 
Hab, Fernando Po. 
8. Cercopithecus Diana. The Diana. B.M. 
Chin with a narrow white beard; fur black, minutely white- 
grizzled ; the broad dorsal streak and rump bay; frontal band, cheeks, 
chin, throat, chest, front of shoulders, inside and back of thighs, 
and streak across the haunches white ; face, tail, and outside of hind 
legs and wrists black. 
Simia Diana, Linn.; Audeb. t.6. Cercopithecus Diana, Frail. C. 
aad diadema, Kuhl. 
Var. ignita (adult), Back edge and inner side of thighs bright red 
bay. B.M. 
Hab. West Africa. 
See C. roloway, Fischer, Syn. Mamm. p.20. Above deep brown, 
nearly black; head, sides, thighs, and legs dull grey; 
frontal band and chin-beard white ; throat, chest, belly, and 
inside of thighs yellowish white. 
9. Cercopithecus leucocampyx. The Diadem. B.M. 
Fur grey brown, minutely grey-grizzled ; underside of body black ; 
crown, outside of limbs, and all but base of tail black; front edge of 
thighs and band across haunches whitish. 
Simia leucocampyx, F.-Cuv. Mamm. Lith. t. Cercopithecus leu- 
cocampyx, Martin. C. diadematus, Is. Geoff. Voy. Bélang. C. 
dilophus, Temm. La Diana, F. Cuv. Mamm. Lith. t. 
Hab. Africa; White Nile. 
10. Cercopithecus mona, The Mone. B.M. 
Fur blackish olive, minutely yellow-grizzled ; tail and outside of 
limbs black ; chest, belly, inside of limbs, and spot on rump whitish ; 
streak from eyebrows to base of ears black. 
Adult. Darker, and more brightly coloured; frontal band indistinct. 
B.M. 
Mone, Buffon, H, N. xiv. p. 258, t. 36. Supp. vii. t.19. Cercopithecus 
mona, Arzi, Simia mona, Schreb. S. monacha, Schreb. 
Var. Monella. Smaller, paler; beneath whiter; frontal band di- 
stinct ; no black streak from eyebrows to ears. B.M. 
Hab. Senegal. 
See Cercopithecus Grayi, Fraser, Catalogue Knowsley Collection, 
Aug. 1850. “Very closely allied to C. mona, and differs in 
