1907.] MONKEYS OF TlllC GENUS CERCOPITHECUS. 703 



Pousargues says ^^ genis alb is" (cheeks white); but since there is 

 no niembei- of the Albogularis-group which has the cheeks, in the 

 English acceptation of that term, white, one must conchide that 

 Pousargues was referring to the area of the jaw behind the corner 

 of the mouth. He could not have failed to notice so striking a 

 difference between C. albotorquahcs and C. (dbogidaris, had the area 

 of the face below a line from the corner of the eye to the ear been 

 white in the type that received the former name. 



Cercopithecus kolbi Neum. 



Subsp. KOLBI Neum. 



Cercopithecus kolbi O. Neumann, P. Z. S. 1902, vol. ii. p. 144. 



Closely related to C. alhogidaris, of which it may prove to be a 

 subspecies, but distinguisha,ble by the greater distinctness of the 

 white collar and its extension over each side of the neck on to the 

 nape, so that a space of about two inches or less of speckled hair 

 in the middle line separates the two ends. The colour of the dorsal 

 side much resembles that of C albogidaris rufilaPus. Hairs on 

 the ears long and whitish or greyish. 



Loc. Kedong escarpment {C. S. Betton, type no. 0.1.3.1 in 

 B.M.). 



The British Museum also has examples from Mt. Kenia, 8000- 

 9000 ft. {A. H. J^eumann), Roromo {Lord Delmnere), and the 

 Nairobi Forest {C. S. Mackinder) ; and there is one in the 

 Society's collection ticketed " Uganda," which belongs to the 

 typical 01- to a nearly related form. 



According to 0, Neumann, C. kolbi differs from C. (dhotorquatus 

 Pous. by its longer fur, owing probably to its being a mountain form, 

 by the presence of the white fringe on the ears, by the absence of red 

 on the anal region and base of tail, and of the reddish tinge on the 

 hind legs, and finally by the less sharp definition between the dark 

 and white areas on the neck. 



Mr. Neumann does not state whether he has seen the type of 

 C. cdbotorquatus^ or whether he differentiated Cj. kolbi by the 

 description only. The specimens of G. kolbi examined by Neumann 

 show considerable variation in the distinctness of the white collar. 

 Again, although the skin of the pubic region is cut away, there is 

 a considerable quantity of brownish- red hair at the sides of the 

 ischial callosities, both in the specimen collected by Mr. Betton on 

 the Kedong escarpment and in the one from Roiomo. In the 

 examples from Nairobi, which are altogether less well-coloured, the 

 red hair on the anal region is not so conspicuous. Perhaps more 

 than one subspecies is here involved. 



Subsp. HiNDEi, nov. (Plate XXXIX. fig. 3.) 



Differs from typical C. kolbi in the following particulai's : — 

 Nose and upper lip clothed with a more distinct short coating 

 of greyish hairs. Hairs on cheeks and head with a very decided 

 reddish-yellow not greyish-yellow tinge. Ear-tufts not uniformly 

 Proc. Zool. Soc— 1907, No. XLYII. 47 



