gio 



FRESH-WATER BIOLOGY 



Fig. 1378. Typical wing venation in the aquatic families of the Diptera, 



a, Psychodidae 



b, Tipulidae 



c, Blephoceridae 



d, Dixidae 



e, Culicidae 



/, Chironomidae 

 g, Simuliidae 



Moth flics 



Crane-flies 



Net-winged midges 



Dixa-midges 



Mosquitoes 



Midges 



Black-flies 



h, Tabanidae 

 i, Stratiomyidae 

 j, Leptidae 

 k, Dolichopodidae 

 /, Empididac 

 m, Syrphidae 

 n, Muscidae 



Horse-flies 

 Soldier flies 

 Snipe-flies 

 Dolichopods 

 The empids 

 Syrphus flies 

 {s, lat.) 



in the Chironomidae, Tipulidae, etc., or even to enter into detailed 

 statements as to their habits. A few of the famihes are compara- 

 tively small and unimportant. The moth flies (Psychodidae) are 

 very minute, being among the smallest of flies, and live as larvae 



