EPHYDRID.^. 



305 



somewhat the rat-tailed larvae of the Syrphidae. The 

 mouth, however, always has hooklets, and the 'tail' is 



Fig. 120. Ephydridte. 13, Lytogaster, sp. (Illinois), wing; 14, Lytogaster^ 

 abdomen; 15, Lytogaster, head; 1(5, Ochthera, sp. wing; 17, Ochthera, sp. front 

 leg; 18, Ochtheroidea atra, male, front leg; 19, Brack gdeutera argentata, wing; 

 20, Brackydeutera argentata, head; 21, Discocerina, sp. head; 22, Discocerina, 

 sp. bristles of front; 23, Gastrops, sp. head; 24, Parydra sp. wing; 25, Pelo- 

 myia occidentalis, bristles of thoracic dorsum; 26, 27, Lipochceta, head (Co- 

 quillett). 



