CYCLORRHAPHA 



Proisoscidea 



28 



Syrphidae 



Fig. 92. Ischyrosyrphiis glaucius Linn. 

 9 1 1 X 24 mm. (Stratlikelly.) 



Fig. 93. Didca fasciata Mcq. (J lox ly mm. 

 (N. Kent.) 



i ? 



Figs. 94, 95. Cataboinba pyrasiri Linn. $ 15 x25 mm., 5 14x25 mm. Very common on flowers, 

 June to October. The leech-like larvae are valuable allies of the gardener, feeding as they do on 

 aphides and scale insects. 



