1907.] MONKEYS OF THE GENUS CERCOPITHECUS. 729 



laterally into the wliite of the cheeks. The top of the head 

 and the cheeks strongly conti'asted from each other in coloui'. 

 The head, neck, ujjper parts of the body, and outside of the limbs 

 speckled gi'eyish yellow and black, the general effect of the 

 combination of speckling being greyish green ; the outside of 

 the limbs grej^er than the body and head ; the hands and feet 

 also grey or becoming gradually and lightly infuscate. Tail 

 greyish speckled above, white beneath throughout, sometimes 

 (? always when the tail is complete) with longer white hairs at 

 the end ; at the base on each side a tuft of white hairs and white 

 beneath at the root. The whole of the under side of the body 

 and the inside of the limbs white ; no red or yellow hairs on the 

 pubic or anal ai-eas. 



Loc. Upper Nile : Abyssinia, iSenaai', Kordofan. 



During recent yeai-s the name ceihwjys Linn, has by almost 

 common consent been aj)plied to one of the species of Cercocehus. 

 I can find no reason, however, for doubting the correctness of 

 Mr. de Winton's verdict that it was given in the first instance 

 to the species of Cercojyitheciis of the Upper ISTile which is usually 

 cited as sabceus or griseo-viridis. 



At the present time there are living in the Gardens thi-ee 

 subadult examples that I regard as typical C. cethiops, one from 

 Khartoum and t\A'o from the White ISTile. AjDparently refei-able 

 to the same form are three examples in the British Museum, 

 namely, one from Senaar [Parreyes coll., 46.6.15.53), one from 

 Renk in the Sudan [B. M. Haivher, 1.8.8.1), and one from 

 Metola Shoa, 11,000 ft. alt. ( IF. N. Macmillan, 6.11.1.3). In the 

 last the head and body measure 510 mm. and the tail 600 mm. 

 I do not know whether examples of the t}q3ical subspecies ever 

 have an}' red colouring in the hair at the base of the tail 

 below. 



Subsp. ELLENBECKi Neumann. 



Cercoinihecus eUenhecki jSTeumann. SB. Ges. nat. Fr. Beilin, 

 no. 3, p. 50, 1902. 



Intermediate between C. a\ hllgerti and C. ce. cethio2>s from the 

 White Nile. Most like the latter, but the upper side deeper olive- 

 yellow. Feet and hands somewhat darker. Under side of tail 

 clear grey, only the extreme tip white. 



Loc. Zuai Lake (Suksuk and Maki Rivers). 



Two examples in the British Museum perhaps belong to this 

 local race. One is a specimen identified by Gray * as C. engy- 

 thittia Herm., and the other belonged to the East India Company 

 and is labelled " Ashkowa (44.9.30.15)." Both are much greener 

 in colour thair those mentioned above, which came from Benk 

 and Senaar. It is possible also that the two specimens in the 



* ChJorocehvs enr/n'Jiitlia Htrmann, Gray, Cat. Moiikoys Brit. Mus. p. 2C, 1870. 



