101a (100a). Three ocelli present; palpi normally prominent; proboscis adapted for piercing (Figs.A-E);

top of head hollowed out between eyes; abdomen tapering or oval; lobe

(alula) usually at base of wing (both larvae & adults are predators) ….....(Diptera) .. Asilidae

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A B C

D E

101b. One ocellus or none present; antennae with 4 segments; palpi vestigial; proboscis with

fleshy labellae (= exposed tip of labium); large flies (Figs.A-C) (both larvae & adults

are predators)..............................................................................…..................…......(Diptera) Mydaidae

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A B C