KUNGL. SV. VET. AKADEMIENS HANDUNGAR. BAND 58- N:0 2. 



35 



As a conclusion from this it miglit be suggested that Matschie's Cercopithecus 

 schmidti sassw, which lias been established 011 only one female specimen, may be a some- 

 what aberrant specimen of the same kind as enkamer. The type of C. s. sassce appears 

 to have cranial dimensions very nearly agreeing with those of the female n:o 24 of this 

 collection (ef. above). 



Cercopithecus pygerythrus centralis Neumann. 



1 <f ad., 1 <$ juv. 5 /io 1913, Rutshuru; ef, $ ad. 1 f 1 1913, ibid.; 1 ef ad. 7 / 1() , ibid. 

 This race is generally less brightly coloured than its East African allies, and the 

 black on the chin and around the corners of the mouth somewhat more broadly de- 

 veloped. Head and neck are usually darker than the back, and the black is in most cases 

 (only one exception among these 5 specimens) dominating över the bnff rings. It appears 

 t hus less suitable when Elliot begins his description with the expression: »Top of head 

 buff . » The hands become black at an early age, at least in the males, already when the 

 first molar is developed. In the same stage the feet of the male are only spotted with black, 

 and in the adult femalcs they are, even when the teeth have become pretty well worn, 

 tinged with blackish brown, but in the adult males the feet are quite black. The colours 

 of the female are generally duller than those of the male. The colour of the tail is variable. 

 Often it is much mixed with black on the upper side, especially towards the end; in other 

 cases it is rathcr påle even at the end. The rufous at the root of the tail and on the scrotal 

 tract is well developed even in the young male, but in one of the adult males it is hardly 

 visible at the latter place. In the adult female the rufous is seen as well at the root of 

 the tail as below the callosities. 



ef ad. 



C? ad. 



ö" ad. 



? ad. 



Total length of skull 9!) mm. 



Occipitonasal length 8ti » 



Basal length 71 



Zygomatic width 



Least postorbital width 42,8 » 



Width of hrain case 54,3 » 



Length of nasals i J5,2 >» 



Upper molar series | 26,2 » 



104,5 



mm. 



KU 



mm. 



91,4 mm 



90 





86,5 



» 



81,2 » 



70 





7.5 



» 



62,8 



74 



» 



70 



» 



— 



44,5 



» 



43,3 



» 



40,3 » 



56 



» 



56 



» 



— 



16 





15 



» 



14 



24,6 





25,2 



» 



20,6 



The capacity of the brain-cavity is about 68 ccm. in an adult male, but in a young 

 male with only first molar developed about 50 ccm. 



C. p. centralis takes in the Central Lake district undoubtedly the same biological 

 place as the »Tumbili» monkeys in East Africa inhabiting dry forests, acacia-groves, 

 gallery forests at the rivers of the steppe country etc. 



