ORTHORRHAPHA 

 Brachyceka 



Empidae 



Dolichopodidae 



Lonchopteridae 



Fig. 53. Etitpis tcsscllata F. At rest, 12 mm. to 

 e.\tremity of wing. Common on hawthorn blossom. 

 Predatory insects, the imagines seizing other insects, 

 from which they suck the juices. They are decidedly 

 beneficial: for examples see Prof Poulton's "Pre- 

 dacious Insects and their Prey'' on Empidae and 

 their Prey, Trans. Eiitomolflgical Society of London, 

 1907. 



Fig. 54. Hihirn maura Y. (J 4-5 x 1 1 mm., ? 4X 

 lO"5 mm. In swarms on Bourn Brook, Grantchester. 

 (N. D. F. Pearce.) Intense dark brown to black 

 throughout. $ has forelegs dilated. The Hilarae 

 feed on small insects, especially flies, but also 

 Aphides. They assemble in swarms, and dance 

 about in the air, especially over streams and pools. 

 (Theobald.) 



Fi" 



Clirysoliis ni\^lccliis W. J 



17 VI. 



1907, Studland. .-Xn iridescent green fly with pale 

 buff-coloured legs. N. Forest. (Adams.) 



Fig. 56. Lonchopli-ra hitcaVi.. $ 3 x S mm. 24\ii. 

 1S90, Harlesden. The $ has different venation. .A 

 brown fly, with legs of lighter hue. 



