1907.] MONKEYS OF XHK GEXUS CERCOPITHECUS. 701 



S'clafer); Chiradzula (^4. Whyte); Milanji Plateau, 3500 ft., and 

 Foi^t Lister, Milanji, 6000 ft. ; Manzi, on the E. shore of Lake 

 Shirwa (^4. Sharpe). 



The skins from the above-mentioned localities are in the British 

 ]\Iusenm and in the Society's Collection. 



This form has also been recorded from Cape Corrientes {Peters) 

 and from Quilimane and the Lower Zambesi {Peters d' Kirk). 



The adult male and female from which the description has 

 been taken came respectively- from Fort Lister, Milanji, and fi-om 

 Chiradzula. I have also seen young females fi'om Milanji and 

 Chiradzula, and a young male from Manzi. 



The name alhogularis or alhigularis has been applied to Monkeys 

 both fi'om East and West Africa. The type of C. alhogularis, how- 

 ever, was said to have come fi-om Madagascar. This informatioxr 

 fixes with practical certaintj- some pai-t of East Africa as its origin. 

 In the original description. Sykes speaks of the coloured area of 

 the back as " yelloioish ochre " ; and since the East-African speci- 

 mens known to me which best fit this desciiption are those 

 I'eferable to the form named C. erythrarclms by Peters, I regard 

 erythrarchus as a synonym of alhogularis. In this I follow 

 Di'. Forbes, who, however, altered the wording of Sykes's 

 description, and described the coloured area of the back as 

 " brownish yellow " : from which it may be inferred that the 

 specimens he had before him at the time were not true C. albo- 

 gulat'is, but were possibly racially identical wiijh the examples 

 described below from the Rufiji River. 



Subsp. BEiREXSis, nov. 



Closely allied to the Nyasaland form C. alhogularis alhogularis, 

 the back and sides being speckled with pale yellow. A slight 

 rufous tinge in the hairs on the sacral region ; but at the root of 

 the tail above and below, as well as on the adjacent area of the 

 rump, a quantity of bright red haii-. The whole of the under side 

 of the body and the inside of the hind legs to the ankle whitish ; 

 the back of the thighs whitish tinged with laifous. 



Loc. Beira. 



Two adult male examples in the British Museum belonging to 

 the Rudd Collection, and shot by Mr. Claud Grant. Measure- ■ 

 ments in mm. of larger specimen : head and body 561 mm., tail 

 601 ; of smaller : head and body 501, tail 658. 



These animals, although adult, resemble the young of the 

 Nyasaland form in the paleness of the under side and the presence 

 of the rufous tinge on the rump and the root of the tail. In 

 these respects they difli'er from the adult of the Nyasaland form 

 C a. alhogularis. 



The type of this subspecies is remarkably like that of C. stairsi 

 mossamhicus, practically the only difference between them being 

 the absence of red on the head of C. a. heirensis. 



