706 MR. R. T. pococK — A REVISION OF [June 18, 



Cercopithecus rufotinctus, sp. n. 



Cercopithecus stair si P. L. Sclater, P. Z. S. 1896, p. 609. 



$ . Distinguishable from G. stairsi by having a reddish tint 

 generally diffused over the upper portion of the head, without 

 distinct definition of the preaural patches ; also in having the 

 cheeks and the long hairs which grow backwards over the sides of 

 the neck beneath the ears decidedly washed with red — in fact, 

 differing but little from the top of the head but very strongly from 

 the shoulders in colour. The dorsal area and the sides of the body 

 are much redder than in the type of C. stairsi mosswinhicus. In 

 this respect the specimen approaches the male of C stairsi stairsi 

 but the hairs are distinctly annulated down to the root of the tail. 

 The shoulders and arms are blacker than in the other specimens, 

 and the outer sides of the legs are grizzly black, as in C. stairsi 

 mossambicus, but darker, and not reddish yellow as in C. stairsi 

 stairsi. 



Loc. British East Africa (? Mombasa). 



A single feniale specimen was presented to the Society by 

 Mr. J. W. W. Pigott on Sept. 20th, 1895. 



This form should perhaps take rank only as a subspecies of 

 C. stairsi. The type, however, differs more from the types of the 

 two subspecies of C. stairsi than they do from each other. 



Cercopithecus francescjs Thos. 



Cercopithecus francescce Thomas, Ann. Mag. Nat. Hist. (7) x. 

 p. 243, 1902. 



Coat long and thick. Prevailing colour of head, shoulders, and 

 sides of body blackish, speckled with grey, the black predominating. 

 Over a definite area of the back from well behind the shoulders to 

 the root of the tail, the speckling is distinctly yellow, but the 

 yellow does not spread on to the sides of the body nor on to the 

 thighs, the blackish colour of which passes gradually into the 

 more distinctly speckled tint of the sides of the body. Ven- 

 tral svirface, inside of thighs, and chest sooty or smoke-grey. 

 Throat and sides of neck up to the level of the lower edge of the 

 ear whitish. Hair on ears with a, more decided reddish tinge 

 than is seen in any species of this section. 



Loc. N'ear the Mount Waller plateau, Lake Nyasa. Reg. no. 

 in B.M. 2.7.24.1. 



A much smaller Monkey than G. albogularis, with reddish 

 hair on the ears and the yellow speckling in the fur confined to 

 the dorsal ai-ea of the posterior half of the body. 



Cercopithecus preussi Matschie. 



Gercopithecus preussi Matschie, SB. Ges. nat. Fr. Berlin, 1898, 

 p, 76. 



Cercopithecus crossi Foi-bes, Nature, vol. Ixxii. p. 630, 1905. 



Head, neck, shoulders, and sides of body blackish, speckled with 

 grey, no yellow in the hair of the whiskers or head. The dorsal 



