718 MR. Ji. I. I'OCOCK — A REVISION OF [June 18, 



Cercopithecus petaurista Schreber. 



Siibsp. PETAURISTA Schreb. 



Simia petaurista Hchreber, Sang. i. p. 103, pi. xix. b, 1775. 



Cercopithecths petaurista Erxleben, and of subsequent authors. 



Cercopithecus fantiensis Matschie, SB. Ges. nat. Fr. Berlin, 

 1893, p. 64. 



Brow-band and temple-band well developed, the latter extending 

 round the back of the head as a parieto-occipital stripe. The 

 anterior part of the cheek and the adjacent area of the face down 

 to the corner of the mouth continuously clothed with jet-black 

 hairs. Some little distance behind the corner of the eye on the 

 temple there is a whitish stripe, which runs obliquely backwards 

 and downwards beneath the ear ; and underlying this there is a 

 conspicuous black stripe, which passes downwards and backwards 

 from the black anterior portion of the cheek on to the side of the 

 neck. The white of the throat runs up on the cheek considei'ably 

 above the corner of the mouth as high as a point on a level with 

 the bottom of the ear, the hairs being directed obliquely upwards 

 and backwards. The black hairs of the cheek just in front of 

 this uprunning white area are also directed iipwards and back- 

 wards. The top of the head, the neck, shoulders, back, and 

 limbs speckled, the head, neck, and limbs being yellower or greener 

 and distinctly less red than the back. The tail speckled through- 

 out above ; greyish white below. 



Loc. Gold Coast : Sekondi (in Zool. Soc, Dr. Careiv) ; Rio 

 Bontag, Cape Coast (type of fantiensis). 



Subsp. BUTTiKOFERi Jeut. (Plate XL. fig. 6.) 



Cercopithecus hivttiJcoferi Jentink, IS'otes Leyden Mus. viii. 

 p. 56, 1886. 



Distinguishable from the typical form C. p>. petaurista by the 

 characters indicated in the key, namely by the absence of the 

 parieto-occipital black band and the presence of a patch of 

 greenish speckled hairs on the cheek adjacent to the face just 

 below the eye. But since some examples I refer to C. p. petaurista 

 have indications of this last-mentioned patch, and since the black 

 parieto-occipital band varies greatly in the degree of its develop- 

 ment, these two features must be regarded, I think, as of sub- 

 specific value. It may be added that Dr. Jentink does not 

 mention the presence of the pale facial patch in his description of 

 C. buttikoferi*. It is, however, present in all the examples that 

 I refer to this form, and was, I presume, overlooked as a distinctive 

 feature when the original diagnosis was compiled. 



Loc. Liberia. 



* Sir H. H. Johnston possibly detected this difference, for he says that 

 C. buttikoferi differs most markedly from C. petaurista in having a long white 

 mark over the ridge of the eyebrows, stretching from the bridge of the nose right 

 across the face to below the ear (' Liberia,' ii. p. 679). This description, however, 

 does not fit examples of this Monkey I have seen. 



