23a (22b). Cerci present; tarsi with 2 segments; wing venation reduced (Figs.A-D); moniliform

(= bead-like) antennae with 9 segments..................................................................................Zoraptera

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A B C D

23b. Cerci absent; tarsi with 2-3 segments; wing venation not much reduced (Figs.A-D); antennae not

moniliform, usually long and hairlike, with 13 or more segments

........................................................................................................................................….........Psocoptera

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A B C

D