II 



FLIES WITH AQUATIC LARVyE 



145 



our window-panes, and would be called a Gnat by- 

 most people. It can be easily distinguished from a 

 true Gnat, by its habit of raising the fore-legs from 



c 



Fig. 43. — Fly of Chironomus. A, male fly; B, female fly; C, antenna of male; 



D, antenna of female. 



the ground when at rest. Gnats under like circum- 

 stances often keep the hirtd-legs raised. The Chir- 

 onomus fly is entirely harmless, and the mouth-parts 

 can neither pierce nor suck. Like many other Diptera, 



