lOO 



HANDBOOK OF ANTS, BEES, ETC. 



Family 24, ScenopinidcB. — The Scenopinidce include a few 

 minute, black flies, not exceeding a quarter of an inch in length. 

 They are not very common, but are sometimes found about 

 windows. 



Family 25, Scroceridce. — This family also contains small species 

 of flies, but their metamoi-phoses are at present unknown. 



Fig. 141. — Medeterus Nolatus (Mag.) 



They are usually to be found resting easily on dry branches of 

 trees, but are generally rare. 

 Family 26, Enipididce. — The insects of this group are very 



Fig. 142. — Dolichopus Regalis (Mag.) 



similar to the Asilidcs in their carnivorous propensities, but the 

 species are usually of a much smaller size. Empis livida is a 

 common yellowish species measuring about one-third of an inch in 

 length. 



Family 27, Dolichopodidce. — This family is a very extensive one, 



