91a (90a). Ocelli present and/or venation reduced; eyes meet above antennae; wing not scaly

(Figs.A-C) (larvae are predators of Homoptera & mites).…....................(Diptera) Cecidomyiidae

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A B C

91b. Ocelli absent; probosis extends far beyond clypeus; wing venation strong; wing veins and

margin covered with scales, usually also on body (Figs.A-G) (larvae of some species

are predators of aquatic arthropods)......................................……........................(Diptera) Culicidae

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A B C D

E F G