SIMULIIDAE OF AFRICA 



173 



291 



292 



293 



294 



299 



300 



301 



302 



Figs. 291-302. Larval mandible of African Simulium ; inner aspect of entire mandible 

 (291-296) and apical teeth only (297-302). 291, general form in subgenera Pomeroyellum, 

 Eusimulium and Meilloniellum. 292, Lewisellum. 293, Phoretomyia, lumbwanum-group. 

 294, form in subgenera Metomphalus and Edwardsellum. 295, Freemanellum. 296, 

 Xenosimulium. 297, Lewisellum. 298, Phoretomyia, lumbwanum-group. 299, Phoreto- 

 myia, copleyi-group. 300, Metomphalus and Edwardsellum. 301, Freemanellum. 302, 

 Xenosimulium . 



