ORTHORRHAPHA 



Nematoceka 



Culicidae 

 Ptychopteridae 





Fig. 1 8 A. C//j?5/c«f, larvae emergiii!;; 



dington.) 



iS. d/li'x pipifiis Linn. $ 6-: 12 mm. 

 tlie commonest of the "gnats.'' 



Perliaps 



Fig. I Si!. C ///5/<v;.v emerging from pupa-case. 

 $ 8 mm. (Micro-slide, Waddington.) 



Fig. 19. Plychoptira albiiiiiiiin F. cJ qA x 

 21 mm. Common in damp places in 

 summer. Larvae li\e in stagnant waters 

 and have a long tube at end of body, which 

 they raise to the surface for breathing. 



