SIMULIIDAE OF AFRICA 



143 



25 



26 



27 



29 



30 



32 



33 



34 



35 36 37 



Figs. 22-37. ( 22_ 34) Adult characters of African Prosimulium s.l. 22-25, degree of develop- 

 ment of the calcipala in (22) Procnephia ; (23 and 24) muspratti-group of Paracnephia ; (25) 

 turneri-group of Paracnephia. 26-30, male ventral plate of (26) typical Procnephia in 

 ventral view ; (27) typical Procnephia in profile ; (28) Paracnephia in ventral view ; (29 

 and 30) Paracnephia in profile. 31-33, coxite and style of (31) typical Procnephia, (32 

 and 33) Paracnephia. 34, female terminalia, ventral view, of Procnephia and Paracnephia. 

 (35-37) Pupal and larval characters of Metacnephia gen. n. : (35) apex of pupal abdomen 

 showing (with enlargement) biramous anchor-like hooklets (redrawn from Grenier 

 & Theodorides (1953) ) ; (36) form of larval postgenal cleft reaching forward to 

 hypostomium ; (37) typical form of apical teeth of hypostomium. 



