'692 MR. R. I. I'ococK — A REVISION OF [June 18, 



Subsp. NiGRiGENis, iiov. (Plate XXXIX. fig. 1.) 



Cercopithecus leucampyx P. L. )Sclater, P. Z. S. 1893, p. 253 (nee 

 ^.'. leuccmipyx Fischer). 



Brow-band broad in the middle, narrowed laterally, mostly 

 white, its anterior hairs long, annulated, pigmented almost to the 

 base and continuous laterally vvith the similarly pigmented and 

 annulated hairs of the anterior part of the cheek adjacent to the 

 naked or nearly naked skin of the face. The whole of the summit 

 and back of the head, the nape and sides of the neck, and the 

 shoulders both above and laterally, as well as the area in front of 

 and below the ears and on the greater part of the cheek, jet-black, 

 the black hair on the cheek gradually blending in front with the 

 speckled hair on the anterioi' part of the cheek adjacent to the 

 face and inferiorly with the greyish-white hair clothing the inter- 

 ramal area and the throat. Upper and lateral portions of body 

 behind shoulders speckled greyish yellow, a little yellower dorsally 

 than laterally ; the speckling scarcely extending on to the tail, 

 which, for the greater part of its length above and below, is 

 black. The posterior part of the throat, the chest, and belly 

 black. Limbs, outside and inside, and hands and feet black ; 

 back of the thighs and, in the female, the pubic I'egion greyish 

 and obscurely s]3eckled. 



Log. W. Africa. 



The type and only known repi'esentative of this subspecies 

 is a single female specimen, ticketed " W. Africa," in the 

 Society's collection. This was identified as G. leuccmipyx by 

 Dr. Sclater, who followed Schlegel in thinking C. pUito of Gray a 

 synonym of C. leucampyx. This specimen dilfers, however, fi'om 

 the type of C. leucampyx, as it does from all the other repre- 

 sentatives of this group, in having the sides of the neck and 

 almost the entire cheek jet-black. It further differs from the 

 type of C. piluto in having the brow-band sharply defined. 



Subsp. PLUTO Gi-ay, 



Cercopithecus pluto Gray, P. Z. S. 1848, p. 56 (text-fig., p. 57), 

 pi. iii. 



Brow-band not sharply defined behind from the colour of the 

 rest of the head, consisting for the most part of white hairs 

 apically annulated. Summit and back of head black, speckled 

 with grey. A black patch on the temple in front of the ear, 

 but the rest of the hairs on the cheek, both close to the face, 

 beneath the ear, and on the sides of the neck, speckled grey and 

 black. Nape of neck and shoulders black, but speckled with 

 grey. Dorsal surface and sides of body paler than shoulders, 

 speckled grey and black. Tail speckled in its basal portion, the 

 greater part of it black. Fore limb jet-black. Hind limb black, 

 slightly speckled but sharply defined by its colour from the sacral 

 area. Belly and chest sooty grey, not speckled. 



Loc. Angola. 



The type of this species is in the British Museum : ISTo, 50.7.9.2. 

 It formerly lived in the Society's Gardens. There is also in the 



