SIMULIIDAE OF AFRICA 



141 



antenna 



cephalic 

 apotome 



head- 

 spots 



hypopharynx 



hypostomium 



postgenal 

 bridge 



postgenal 

 cleft 



Figs. 14 and 15. Dorsal view (14) and ventral view (15) of head structures of a Simuliid 

 larva and their terms. The cephalic fan is shown for one side only. 



