1907.] MONKEYS OF THE GENUS CERCOPITHECUS. 689 



Cercopithecus leucampyx Fischer. 



Key to the subspecies here recognised : — 



a. Hairs clothing sides of neck and of cheeks, except close to the 

 face, jet-black, like the top of the head and the shoulders ; 



a sharply defined, mostly white brow-band Subsp. nigrigenix. 



a'. Hairs clothing sides of neck and of cheeks speckled black and 



yellowish grey. 



b. A brow-baiid of speckled or whitish hairs sharply defined from 



the black of the svimmit of the head ; colour of thighs and of 



sacral area usually gradually blending. 



c. Median area of back greenish, turning to a ruddy tinge on 



the root of the tail : side^ of body noticeablj- paler and 



greyer than back ; tail not distally black Subsp. doggetti. 



c . Back, sides of body, and root of tail nearly uniformlj^ grey, 



speckled ; tail black distally. 



d. Area between shoulders covered with nearly jet-black 



hairs forming with the hairs of the fore legs, nape, and 



head a continuous black area ; hairs on belly distinctly 



annulated ; some grey or white in brow-band. 



e. Thighs much darker thaia sacral area and sharply defined 



therefrom {teste Cnvier) Subsp. leucampyx. 



e'. Thighs not sharply- defined in colour from the sacral 



area Subsp. stuhlmanni. 



d'. Area between shoulders grizzled like the rest of the back, 

 but a little darker ; belly-hairs duskier, less annulated : 



brow-band speckled like cheeks Subsp. carruthersi. 



h' . Brow-band much less defined, the summit of the head and 

 the nape of the neck decidedly speckled, though blackish ; 

 thighs black and sharpl}' defined from sacral area. 

 f. A conspicuous black patch on temple in front of ear ; brow- 

 band largely white Subsp. ^Z««^o. 



f . No conspicuous black patch on temple in front of ear; no 



white in brow-band Subsp. boutourlinii. 



Subsp. leucampyx Fisch. 



Cercojnthecus diana (Le Diane, femelle), F. Cuvier, Hist. Kat. 

 Mamm. i. pi. xvi., 1824. 



Cercojnthecus leucamjyyx Fischer, Syn. Mamm. p. 20, 1829 

 (type C. diana 5 of F. Cuvier). 



Cercojyithecus diadematus Is. Geoflr. St. H. in Belang. Voy., 

 Zool. p. 51, 1834 (type C. diana $ , F. Cuv.). 



Head, neck, shoulders, arms, legs, and tail black, belly and chest 

 not so dark as the rest. Thighs sharply marked off by colour 

 from the sacral region of body, which, like the entire i-egion behind 

 the shoulders, is grey, ticked black and white. Brow-band con- 

 spicuous, white with a tinge of yellow. The whole of the cheek 

 below a line joining the eye and the inferior edge of the ear 

 covered with grey, speckled hairs ; the sides of the neck similarly 

 coloured. Lips, chin, and nose covered with short white hairs. 



Lqc. W. Africa. 



I have seen no specimen quite agreeing with Ouvier's descrip- 

 tion and figure of this species. In drawing up the above-given 

 diagnosis and in placing the subspecies in the analytical key, 

 I have been dependent upon the characters furnished by that 

 author. 



4C5*- 



