-7)1 



cu* ~ cu 1 



FIG. 458. Venation of a cecidomyiid gall-gnat 

 (After Comstock) 



cu* 



FIG. 459. Venation of a fungus-gnat (Mycetophilidae] 

 (After Winnertz, adapted from Comstock) 



la cu 2 m3+cu* 



FIG. 460. Venation of a bombyliid (Pentarbes capita] 

 (After Comstock) 



FIG. 461. Venation of a bot-fly (Gastrophilus sp.) 



(After Comstock) 

 3 2 4 



