1907.] MONKEYS OF THE GENUS CERCOPITHECUS. 687 



referable to two distinct kinds, which are regarded as subspecies 

 and may be distinguished as follows : — 



a. Outer side of hind legs down to ankle pale gre3'ish g-reen, 

 speckled, only a little darker than the area above the thigh- 

 stripe and sharply defined from the black of the foot and 

 ankle ; a little darker over knee Subsp. hrazziformis. 



a'. Outer side of legs blackish olive, much darker than area above 

 thigh-stripe and not so strongly contrasted with the black 

 of the ankle and foot ; a considerable quantity' of black over 

 the knee Subsp. neglechis. 



The type of C. neglectus hrazziformis is the skin of the Monkey 

 identified by Dr. Sclater as Cercojnthecus hrazzce (P. Z. S. 1896, 

 p. 780), v/hich was said to have come from the French Congo. 

 I can find no evidence for this locality. The animal was purchased 

 by the Society from the Gardens in Antwerp, and may there- 

 fore have come from Belgian rather than from French territory 

 in W. Africa. 



Of what may be regarded as the typical form, the British 

 Museum possesses the imperfect skin obtained by Petherick 

 on the White Nile and referred by Gray with some insight to 

 0. leucamjyyx ; a specimen shot by Donaldson Smith on the Omo 

 River, north of Lake Rudolf ; a third from the Charada forest in 

 Kaffa, 6000 ft., procured by Mr. W. N. Macmillan. From these 

 I cannot distinguish subspecifically a series sent home by Mr. 

 G. L. Bates from the Ja River, Cameroons, and taken near the 

 bank of the river at an altitude of 2000 ft. 



The measurements Mr. Bates gives of his specimens are as 

 follows : — 



S . Head and body 580 mm., tail 680 mm. 

 $• „ „ ^^0 „ „ 490 „ 



$.^_. n. „ 485 „ „ 510 „ 

 $■ „ :, 500 „ „ 470 „ 



One of Mr. Bates's specimens difiers markedly fi'om the others 

 and from the eastern forms. The dirty white colour of the chest 

 extends past the mamma? and spreads on to the inner side of the 

 arm, even below the elbow ; most of the hairs on the black band 

 on the head, especially in the middle, have a reddish subapical 

 band ; the tail is not jet-black, but tinged with rufovis, the pale 

 basal ai'ea and the dark poition being much less sharply demarcated. 



According to Mr. Bates the native name for this Monkey in 

 the Cameroons is '• Avut " or " Fum." 



The LEUCAMPYX-group. 



Diademia Reich. 



Skin of face slate-blue ; upper and lower lips and often the 

 nose clothed with short greyish- white hairs. jSTo pink area on 

 upper and lower lips. Fringe of hair on ears almost always 

 white. No black stripe on brow, temple, or cheek ; but fre- 

 quently a speckled or whitish brow-band when the summit of the 



Proc. Zool. See— 1 907, No. XLYI. 46 



