SIMULIIDAE OF AFRICA 



139 



A1 



Cu2 



basal section of radius r r s - j^i* - -'^ 



Cu2 



hind basitarsus 



pedisulcus 



scutum 



aedeagal 

 membrane 



parameral 

 hook 



paramere 



katepisternum 



Figs. 1-6. Structures of adult Simuliidae and their terms. Wing in forms (1) with basal 

 cell and forked Rs, and (2) in forms without basal cell and simple Rs. Second hind tarsal 

 segment and apex of hind basitarsus in forms (3) without pedisulcus or calcipala, and (4) 

 in forms with pedisulcus and calcipala. 5, left lateral view of anterior part of thorax. 

 6, male hypopygium in ventral view (coxite and style shown only in outline on one side). 



