238 



MR. G. A. K. MARSHALL ON THE 



[Mar. 20, 



defined is restricted to the extra-tropical portions of Soutli-east 

 Africa, including the Transvaal, Zululand, Natal, Orange River 

 Colony and Cape Colony east of about 25° E. Long. The following 

 table will give an idea of the relative distribution of the species 

 as at present knovv^n : — 



The predominance of Natal in point of species is doubtless due 

 to the fact that the Colony has been much better worked, as a 

 whole, than the other ai-eas. When the fauna of the Transkei 

 and Pondolarid is better known, it will probably be found that the 

 genus attains its greatest development in Cape Colony. Similarly 

 Zululand and the Transvaal will certainly yield many additional 

 forms. Owing to the large tracts of treeless country in the 

 Orange River Colony the genus is not likely to be well represented 

 there ; and although Dr. H. Brauns has kindly sent me a number 



