304 Dr. D. G. Elliot on 



laterally, clearly not very densely punctured at the sides and 

 along the basal edge ; the elytra, apically about one-third is 

 clearly punctured, the striae, inner humeral shortened apically, 

 1-2 are shortened beliind the middle, 3 somewhat shorter 

 than the fourth, but both are nearly dimidiate, sutural com- 

 plete and joined to the fourth at the base ; the pygidium is 

 evenly and densely punctured ; the prosternum, keel smooth, 

 strije as figured (Ann. xix. p. 320, 1907) tor E. zonatus, Lew. ; 

 the mesosternum is widely sinuous, surface coarsely not 

 closely punctate; the anterior tibiae are il-lO-denticulate. 



The discovery of the above introduces an immaculate species 

 to the genus. 



Hab. Argentina {H. Richter, R. 282). 



One example. 



Xote. — ScaratidaB. 



Maraxes, Lew. Ann. & Mag. Nat. Hist. xvi. p. 376, 

 tigs. 3, 4 (189-3). 

 = Xynophron, Harold, Notes Leyd. Mus. ii. p. 199 (1880). 

 This synonymy has not been recorded in this Magazine. 



XXXIV. — Description of new Species of Monheys of the 

 Genera Cercopittiecus and Fapio. \^y D. G. ELLIOT, 

 D.Sc, F.K.S.E., &c. 



Cercopithecus princeps, sp. n. 



Type locality. Mpanga Forest, west and south of Lake 

 Albert. 



Geoyr. Distr. Mpanga Forest and Mt. Ruwenzori, 5000 

 feet elevation. 



Colour. Forehead, sides of face and head (extendins: on 

 to sides of throat) speckled black and white; top of head, 

 nape, hind-neck, space between shoulders^ arms, hands, and 

 leet jet-black ; upper parts and sides of body speckled black 

 and white; legs black, faintly speckled with white on thighs, 

 and very slightly so on legs beneath knees; chin and tliroat 

 jure wliite ; conspicuous black band across breast below 

 thioat, rest of under parts ii on-grey, the hairs being much 

 less .speckled with white than on the uj)])er parts, and general 

 tone more greyish; tail speckled black and grey on basal 

 half, darker than the back ; remainder jet-black to tip ; ears 



