202 [September. 



So far as my slight opportunities enabled me to hazard an opinion, 

 the Palsearctic fauna of Egypt extends almost unchanged as far south 

 as Wady Haifa. It would, of course, reqitire much study on the spot 

 to define the line, if such there he, north of which Ethiopian species do 

 not range. The line of demarcation may safely be assumed to be dif- 

 fei'ent for different species. For instance, the African butterfly, 

 Catoclirysops eleusis, Dem., is as abundant at Abu Simbel in Nubia, and 

 even at Assouan, as it is at Khartum ; one or two Sudanese moths 

 also, as I have mentioned, extend into Nubia ; nevertheless, I was dis- 

 tinctly impressed with the idea that it was south of the Nubian desert, 

 roughly speaking at the Eiver Atbara, say 17° 30' N., that I first came 

 in contact with the Ethiopian fauna, though, on the other hand, forms 

 which occur in the Palsearctic Region were common enough at Khartum 

 and even south of it, but these were for the most part wide-ranging, if 

 not actually cosmopolitan species. 



The Hon. N. C. Rothschild stayed for some time at Nakheila, on 

 the Atbara, in 1904, where he and his companions, the Hon. F. R. 

 Henley and Mr. A. F. N. Wollaston, took several species of Teracolus 

 and other insects that I met with at Khartum or South of it.* Mr. 

 Rothschild informs me that he thinks the Teracoli probably extend as 

 far northwards as the thin Acacia scrub, that is to say to some point 

 north of the Atbara, but south of Wady Haifa. 



It is interesting to compare with my captiu'es those of Mr. W. L. 

 S. Loat, F.Z.S.,t in 1901 and 1902. Many species are common to the 

 two lists, but not only had he somewhat more time than was at my 

 disposal, but a large number of his insects were taken as far south as 

 lat. 5° N., whereas I did not get beyond 12° 40' N. ; it was therefore only 

 to be expected that, as compared with my captures, his were more 

 strongly Ethiopian, including, e.g., a Neptis and two species of Acrasa. 

 Mr. Loat took 11 species of Teracolus, I took 10 ; six species are com- 

 mon to the two lists. 



As regards the Hymenoptera Mr. Morice writes me : — " I may say 

 that the only insects I had previously examined from Khartum and the 

 White Nile, were those taken by the Swedish expedition five or six years 

 ago, and you have certainly got much more material than they did — 

 though, strange to say, hardly any of the same species ! " 



Highlands, Putney Heath : 

 June, 1911. 



*Sovitatet Zoologica, 1905, pp. 21—33 



fOn Lepidoptem from the White Nile, by F. A. Dixey, M.D., P.R.S., 

 Trans. Ent. Soc, Loud., 1903, p. 141. 



