107a (106a). Spurious vein (= vein-like thickening of wing membrane between 2 true veins) in

wing absent; anal cell usually short....................................................………............................. 108

107b. Spurious vein in wing present; anal cell long, closed near wing margin; body brightly

colored; they resemble bees or wasps) (Figs.A-E) (predators of Homoptera)

...........................................................................................................................….......(Diptera) Syrphidae

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A B C

D E