702 MR. R. I. POCOCK A REVISION OF [Juiie 18, 



Subsp. RUFILATUS, nov. 



? Cercopithecus monoides Is. Geoffr. St. H. Arch. Mus. ii. 

 p. 551, pi. xxxi., 1841. 



Closely resembling the Nyasaland form, but with the back and 

 sides behind the shoulders speckled a rich reddish orange-yellow. 

 Head and neck somewhat thickly speckled with black. No 

 distinct whitish half-collar. Belly smoky grey, darker than in 

 the ISTyasaland subspecies. Thighs dark grey, speckled and 

 sharply defined from the lumbo-sacral area and the flanks. 



Log. Rufiji River, S. of Zanzibar. 



Two specimens in the British Museum, presented by Capt. 

 Wharton, Nos. 78.12.26.1-2. Also a specimen ticketed " Kima, 

 from the coast up to 9000 ft." {Carlisle Fraser, 97.2.14.4); and a 

 third ticketed " Zanzibar Island (J. T. Last, 06.6.5.6)," which is 

 not so richly coloured as the Rafiji and Kima examples. 



Subsp. ALBOXORQUATUS Pous. (Plate XXXIX. fig. 4.) 



Cercopithecus albotorquatus Pousargues, Bull. Mus. Paris, ii. 

 p. 56, 1896 ; 0. Xeinnann, P. Z. S. 1902, vol. ii. p. 144 (wrongly 

 assigned to Thomas). 



Head, nape, shoulders, and cheeks almost down to corners 

 of mouth practically uniformly speckled with yellowish grey and 

 black, the cheeks a little greyer than the head. Throat, sides of 

 neck, and anteiior part of chest a little beyond the mammae snow- 

 white and shai'ply contrasted with the grey of the cheek and the 

 blackish grey of the shoulders. The white on the sides of the 

 neck forms a more definite half -collar than in typical C. albogiolaris, 

 but it does not extend on to the nape or summit of the neck as in 

 C. kolbi. Area from behind shoulders to root of tail speckled 

 with yellow, which spreads over the sides of the body. Tail 

 yellow-speckled at the base above for about two inches, becoming 

 gradually rufous lateiully and inf eriorly ; the rest of the tail dark, 

 indistinctly speckled, the grey speckling gradually dying away 

 posteriorly ; the end black. Inside of fore leg at base ashy grey, 

 becoming sooty grey toAvards the wrist. Outer side of thighs smoky 

 grey, speckled ; inside of thighs much paler grey, whiter at base, 

 ■ where they join the pubic region ; back of thighs greyish white 

 tinged with pale reddish ; a considerable quantity of rusty-red 

 hair on the area at the root of the tail above and outside the 

 callosities. Ventral surface from behind the mammse ashy grey, 

 unspeckled ; hairs of pubic region white. 



Log. ?W. Africa. 



The above-given description is taken from a single female 

 specimen that foi-merly lived in the Society's Gardens. It was 

 identified by Mr. Sclater as G. albogularis. 



In nearly all respects it agrees with the description of C. albo- 

 torquatus published by Pousargues, especially with respect to the 

 colour at the root of the tail, on the back of the thighs, and the 

 collar on the sides of the neck. It must be noticed, however, tha,t 



