LEPTOGASTER. Slim Fly. 



I. /,. histrio. ^3 in.; chest reddish brown, with three black stripes; body brown, with white bands ;md 

 yellow legs ; hind legs with brown bands. 



HYBOS. Hunchback Fly. 



i. H. thoracicus. % in. ; brown, with yellow shanks : wing smoky, with brown edge spot. 



Family 18. EMPID/E. Dance. Flies. They dance and hunt in swarms on shady brooks, and feed on 

 insects. Their grubs live on decaying vegetable matter. 



RHAMPHOMY1A. Bill Fly. 



1. R. cilipes. ] in. ; gray, with four stripes on chest and white hairy hind shanks. 



2. R. americana. ]^ in. ; slate gray, with yellow legs. 



3. R. scolopacca. t 3 ff in. ; blackish gray ; chest faintly striped ; body silvery ; legs brown. 



HEMERODROMIA. Catch Fly. 



i. H. superstitiosa. ^ in. ; whitish, with broad black stripe on chest and body. 



TACHYDROMIA. Race Fly. 



I. T. fenestrata. }% in. ; black, with yellow legs and black stripe on shanks. 



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