ORTHORRHAl'IlA 



Nematocera 



Bibionidae 

 Simuliidae 

 Chironomidae 



Fig. lo, lii/'io /loy/ii/aiius hmn. JgxiSmni. 

 \'ery romnion, icstin>; on leaves in gardens 

 in spring. Larvae feed on hops and roots. 

 Flies of this family found as fossils. 

 (Theobald.) 



Fig. 1 1 . Simulium ciiwnum Mactj. 

 9 35x8 mm. One of the " .Sand 

 files" of Europe. 'I"he adults bite 

 viciously, and are thought to cause 

 Pellagra. Larvae and pupae are 

 aquatic in running water. 



Figs. 12, 13. Chirononuis riifipcs Linn. (J 8 x 10-3 mm., 

 Juno. Larvae aquatic, known as "blood-worms. 



? 6x 12 mm. Hedges and riversides in 

 found in rain-barrels and pools. 



