98 Mr. F. M. van der Wulp on Asilidm from Aden. 



V. d. W. and suffusus, v. d. W. From the first it differs in 

 the total want of silvery pilosity on the fore legs of the 

 male ; and from 0. suffusus in its hyaline wings. O.Jiavipes, 

 Low, from South Africa, certainly belongs to the same 

 group, but it has yellow legs without brown tips to the 

 femora and tibioe. 



Plates II. and III. 



[Sec Explanations facing the Plates.] 



