Butterflies of Southern Kordofan. 285 



716. Sarangesa pertusa, Mab. 



Three, Kadugli, Dec. 23, 1904. 

 Not in the White Nile list. 



71c. Caprona adelica, Karsch, var. Kordofani, B.-B. 

 var. nov. 



One, Tira Mandi, Nov. 25, 1904. 



Mr. Bethune-Baker says that this is the dry-country 

 form, whereas C. cassualalla, B.-B., is the more variegated 

 western form of the same insect found at Angola.* 



I have taken C. adelica at Sydenham, Natal. It is not 

 in the White Nile list. 



72a. Gegenes obumbrata, Trimen. 



One <J of the tvpical form, Tira Mandi, Nov. 25, 1904. 

 Not in the White Nile list. 



726. Hesperia mafa, Trimen. 



One, Sungikai, Nov. 13, 1904; two, Kadugli, Dec. 13, 

 29, 1904. 



Not in the White Nile list. This is a South African 

 species. 



How does the butterfly fauna of the Nuba Hills compare 

 with the fauna of the White Nile hitherto known to us ? 



To begin with, material is sadly deficient for such a 

 comparison, as is so often the case. For example, my 

 White Nile list is founded for the most part on captures 

 made in the month of February, whereas Capt. Wilson's 

 insects were taken in November and December. Again, 

 the time devoted to collecting at each place was a matter 

 of days, more often of hours. These limitations should be 

 kept in mind. 



Although much of Northern Kordofan is more or less 

 desert in character, both Mr. Willis and the Government 

 Handbook speak of " forests " in the region of the Nuba 

 Hills; it might therefore be reasonably expected that the 

 fauna of the latter would exhibit a forest rather than a 

 desert aspect. 



* See Ann. and Mag. Nat. Hist., 1916, p. 380. 



