'I 



^ 



- 138 - 



because the subapical rings of the hairs of this région are rust red. 

 The chin is light buff (30g. i) the throat a shade darker (309.2). The 

 under parts are otherwise beautifully rust red, which aiso extends 

 ail over the inside of the liinbs and is deepest and most fiery on 

 the anterior and inner sides of the hind leg. The outer side of the 

 hind limbs is also rust red ail along onlv a little duller on the feet. 

 The long hairs on the outer posterior surface of the thighs are 

 ringed with blackish which, however, does not much alter the 

 rufous colour of the same. The tail is speckled greyish brown on 

 the upper side of the proximal half, much paler brownish grey on 

 the lower side, but it becomes gradually blacker towards the 

 middle, and the distal half inay be termed black. 



Total length of the tanned skin about 98 cm., 55 of which come 

 on the tail. 



The skull of this type is unfortunately incomplète with the 

 greater part of the braincase lacking. To judge from the teeth it 

 bas been a fuUy adult female, but its raolars are not much worn. 

 The length of the upper molar séries is 21,3 mm. and that of the 

 lower 23,6 mm. 



This very beautiful Guenon is undoubtedlv related in some 

 degree to"C. Wolfi, but at once distinguished from the same not 

 only by its rust red under parts, but also by the buff band above 

 the black on the sides of the head, by its buff whiskers and bv the 

 arms not being black, but of the same colour as the back. It might 

 also be related to C. grayi palliihis Elliot, although the latter 

 has quite différent colour of bodv and limbs. 



As only one spécimen is known, it is as yet not possible to say 

 anything about the distribution of the species, but it is most pro- 

 bably at home in the surrondings of Kwango river. 



Cercopithecus Denti Thomas. 



Baraka (Pauwei.s), 869; Fundi (Christy), 1564- 1565; Mawambi 

 (Christy), 2107. 



The spécimens from the northern Ituri district (Mawambi, 



