22 SIMIAD^. 



side of the tail red bay ; face, temjiles, and limbs black ; cheeks 

 white. 



Cercopitliecus 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 ■ni-ists black. 



Simia Diana, Linn. ; Audeh. i. 6. Cercopithecus Diana, Erxl. C. 

 diadema, Kuhl. 



Var. ifjnita (adult). Back edge and inner side of thighs bright red 

 bay. B. M. 



Hah, West Africa. 



See C. rohway, 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, beUy, and 

 inside of tliighs yellowish white. 



9. Cercopithecus leueocampyx. Tlie Diadem. B. M. 



Fur grey brown, minutely grey-gi'izzled ; underside of body black ; 

 crown, outside of limbs, and all but base of tail black ; fi'ont edge of 

 thighs and band across haunches whitish. 



Simia leucocampj-x, F. Cut. 3Iamm. Lith. t. Cercopithecus leu- 

 eocampyx, Martin. C. diadematus, 7s. Geoff, l^oy. Belong. C. 

 dilophus, Temm. La Diana, F. Cuv. Mamm. Lith. t. 



Hah. 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 ; fi'ontal band indistinct. 



B.M. 



Mone, Buffon, H. N. xiv. p. 2-58, t. 36. Stqyp. vii. 1. 19. Cercopithecus 

 mona, Erxl. Simia moua, Schreb. S. monacha, Schreb. 



Var. MoneUa. Smaller, paler ; beneath whiter ; fi'ontal band di- 

 stinct ; no black streak from eyebrows to ears. B. M. 



Hah. Senegal. 



See Cercopitliecus Grayi, Fraser, Catalogtie Knowsley Collection, 

 Aug. 1850. " Very closely allied to C. mona, and difiers in 



