GUENONS. 



103 



upper parts either greyish or olive-brown, finely grizzled with grey or yellow. 

 From above the eyes to the ears there is a black streak, while there is also a stripe 

 <lown the back of the same hue ; and the hands and feet, as well as the tail, are 

 likewise black. The forehead, the whiskers, the small moustache, and the under 

 parts of the body and the inner sides of the limbs are yellowish. This species has 

 been obtained from Fernando Po and the Gabun. 



Campbell's monkey, which inhabits Fernando Po and Sierra Leone, may be 

 distinguished by the absence of the black streak running from above the eyes to 

 the ears, and also by the whitish colour of the under-parts and inner sides of the 

 limbs. The general colour is blackish-olive, washed with yellow. 



The red-brown colour of the chest and under-parts, from which it takes its 

 name, are amply sufficient to distinguish the red-bellied monkey ; but as additional 

 characters we may mention that the outsides of the thighs and legs are greyish- 

 black, while the front of the thighs and the under surface of the tail are greyish- 

 white. 



Finally, Wolf's monkey, which has light under-parts, differs from the other 

 species in the ferruginous colour of the legs, as well as by the light patches on 

 the inner sides of the arms and thighs. This species is interesting as being the 

 .only representative of the mona group (if we exclude the larger Sykes's monkey) 

 which is found eastward of Western Africa. 



THE BLACK-BELLIED MONKEY (Cercopithecus pluto). 



The black -bellied or pluto monkey, from Angola, is another West African 

 species, readily distinguishable by the 

 dark colour of the under - parts of 

 the body and the inner sides of the 

 limbs, which are typically of a reddish- 

 black. 



Like the species of the mona group, 

 there is no beard, but large bushy 

 whiskers, well shown in the accompany- 

 ing figure. 



The general colour of the fur is black, 

 finely grizzled with grey; the forehead 

 has a white band, and the sides of the 

 forehead, as well as the shoulders, chest, 

 tail, and limbs, are entirely black, and 

 there is no white on the haunches in the 

 typical form. 



Dr Anderson identifies, however, 

 with this species the so-called diadem 

 monkey (C. leucocampyx), which also 

 has black under-parts, but is distin- 

 guished by a white streak across the 



, THE BLACK-BELLIED MOXKET. 



haunches. (From Gray Proe . ZooL Soc . ) 



