52 



Dr. G. B. Longstaff on 



will without doubt add many species to my list, more 

 especially among the less conspicuous Lycaenidae and 

 Hesperiidae, and will give new localities to many species 

 already recorded. 



The following lists illustrate the relationship between 

 the two faunas, and may, I hope, be instructive in other 

 ways. The first (and longer) list gives all the butterflies 

 for which I have records from Khartum up to Ad-Duwem ; 

 the four shorter lists give the additional species met with 

 for each 2° of latitude as one ascends the river. 



Species recorded in Latitudes 16° N.-M° N. 

 (Khartum to Ad-Duwem inclusive.) 



Additional Species recorded in Latitudes 



14° N.-12° N. 



(S. of Ad-Duwem to Gebel En.) 



* It is not stated where the Swedish expedition came across this 

 butterfly. 



