2a (1a). Wings membranous, not hardened or
leathery..................................................................
.
. 3
2b. Front wings hardened or leathery, at least
at base (Figs.A-E); hind wings, if present, usually
............
membranous
24
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![](./guide2_files/image004.gif)
D
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![](./guide2_files/image005.gif)
E
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