1907.] MO>fKEYS OF THE GENUS CERCOPITHECUS. 699 



foi'e part of the belly, and the upper part of the inside of the fore 

 limbs are said to be white. Examination of a large number of 

 skins may show that Liberian and Nigerian examples are sub- 

 specifically distinct ; but as yet there is no evidence of this, so far 

 as I am awai-e. 



The above-given description is taken from the skin of an adult 

 ■female in the British Museum labelled "[Neighbourhood of 

 Oamei'oon Mountains, 71.7.8.2 ; purchased of Mr. Cutler." There 

 is also a smaller example in the British Museum from Jebba, on 

 the Niger (G. F. Abadie : no. 0.3.29.1), which has the belly paler 

 and the tail more speckled and no red on its base beneath and 

 no red hairs on ischio-pubic region ; also three specimens ( 5 ) 

 in the Society's collection labelled " W. Africa," and numbered 

 11.7.96 to 21.4.1901, 6.3.1900 to 24.1.1901, 3.4.1900 to 15.8.1900, 

 the nvimbers indicating the date of arrival and death. These 

 have more green in the hair than the wild-killed examples, 

 and the white of the chest extends down the middle line of the 

 belly about as far as the umbilical region, and in neither is there 

 so much red upon the anal area as in the adults. 



Recently the Society received as a donation from Captain 

 Rudkin a very young example from Asaba, on the Niger, 



There is also in the British Museum a specimen labelled 

 '•Delta of the Niger; Dr. Baikie's Coll.; no. 62.7.17.3," which 

 differs from the other examples I have seen in having the nose- 

 spot pale lemon -yellow instead of white and the pale areas of the 

 frontal hairs much redder, the red being particularly noticeable 

 in those just above the eyebrows. The speckling of the belly and 

 back is also less distinct. 



Additional examples from this same area may prove these 

 charactei'S to have subspeciiic value. 



The ALBOGULARIS-group. 



Nearly allied to the Leucampyx -group, but with much less l^lack 



pigment in the coat. The head, nape, shoulders, and cheeks very 



uniformly coloured, as a rule speckled yellowish-gi'ey and black ; 



the head sometimes a little darker, I'arely with a red tinge or 



patches of red. The lumbar and sacral regions of the back more 



brightly coloured than the shoulders and head, owing to the 



presence of yellow or red annuli in the hairs, the red or yellow 



sometimes restricted to the dorsal area, sometimes spread over the 



sides of the body. 



a. Proximal third of under side of tail nearly white and sharplj"- 

 defined from the iron-gre^^ upper side ; dorsal area of body 



dark iron-grej' with scarcely a tinge of yellow labiatus. 



a'. Upper and under sides of tail uniformlj' coloured, or approxi- 

 mately so; some yellow or red in the hair, at least of the 

 liimbo-sacral area of the l)odJ^ 

 h. Some almost wholly red hairs on the head, forming at least 

 a rufous patch above and in front of the ears. 

 c. Cheeks strongl}- suffused with rustj' red and markedly 

 contrasted with the blackish-grey tint of the shoulder 



adjacent to the neck rufotinctus. 



c'. Cheeks without any red, approximately of the same 



speckled yellowish-grey tint as the shoulders sta irsi. 



