Family 15. THEREVID^E. Stiletto Flies. Live near the ground and prey on other insects. Their 

 larva; live in fungi or mould. 



THEREVA. Stiletto Fly. 



1. T. frontalis. '4 in.; black; chest with two yellow stripes ; body with yellow bands. 



2. T. nigra. y\ in. ; black ; body with white edges. 



Family 16. MIDAID/E. Midas Flies. They prey on other insects, and are easily known among flies by 

 the unusually long feeler, with a knob on the end. Their larvae live in rotten stumps. 



MIDAS. 



1. Af. tibialis. i ',- in.; black, with yellow shanks and feet; wing 



brown. 



2. M. clavatus (Jilatus). % to i j^ in.; black; second ring of body 



yellow ; wing smoky black. 



3. M. iopterus. 7/% in.; black; sides and two spots on body yellowish ; 



wing steel blue. 



O 



4. M. fnh'ifrons. y^ in. ; black ; middle of body orange. 



Family 17. ASILID/E. Flies of Prey. Robber Flies. They live on various insects and caterpillars, 

 and even a bumblebee or dragon-fly has to succumb to their strength. Grabbing their prey with their strong 

 legs, they suck out its juice, and leave but the shrivelled skin. Their larvaa live underground in roots or rotten 

 wood, where they feed on other grubs. 



DIOCTRIA. Hawk Fly. 



i. D. octopitnctata. ]^ in. ; black ; chest with yellow stripes ; body with four white spots on each side ; legs 

 yellow. 



(30) 



