12 SUPPLEMENT 



defassa, based on the specimens in the collection of Major Powell- 

 Cotton, These are Cobus defassa hawashensis, Hawash river, p. 413 ; 

 d. powelli, Laikipia, p. 415; d. angusticeps, do., p. 4 1 6 ; d. nzotae, 

 Guasengishu, p. 417; d. fulvifrons, e. of Kitosh, p. 418; d. avel- 

 lanifrons, Lake Albert district, p. 419 ; cottoni, do. ,p. 420; dianae, 

 do., p. 421 ; d. breviceps, Pembe on the Nile, p. 424; d. ladoensis, 

 Lado district, p. 426 ; d. griseotinctus, n. of Lado, p. 427. Their 

 main points of difference are based on colour. 



VAUGHAN'S KOB 



(Page 206) 



From observations made by Mr. Selous in the Bahr-el-Ghazal (see 

 the Field, September 2nd and 9th, 191 1) it appears that Vaughan's kob 

 is restricted to the east central, central, and northern districts of that 

 province, and that in summer it turns blackish. On the other hand, 

 the kob of the south and south-western districts is a yellow-eared 

 animal apparently related to the Uganda race of Buffon's kob. The 

 observations, supplemented by heads in the dark dress brought home 

 by Mr. Selous, indicate that Vaughan's kob is merely a local race of 

 the white-eared species. For the present I do not propose so to 

 name it, since, as I have suggested in the text, all the above forms may 

 prove to be local races of Buffon's kob. 



ROBERTS' LECHWI 



Cobus robertsi 



On page 222 of the text this lechwi was stated to have been 

 founded on immature specimens of C. sinitJieiiiani. Mr. Rothschild, 

 who owns the type specimen, informs me, however, that this is not the 

 case. C. robertsi appears, indeed, to come closer to C. leche than to C. 

 smitheDiani ; and is found in company with the former, from which it 

 differs by the black patches on the sides of the lower part of the neck 

 and part of the shoulders, as well as by the admixture of black on the 

 cheeks and the sides of the throat and neck. The horns are also 

 stouter, with the ridges closer together and wider. 



This species is a native of northern Rhodesia. 



