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31. Flagellum with 4 funicular segments in males and females. Postmarginal vein 2x or more stigmal vein length (aa1).

Sympiesis Förster, 1856

31'. Flagellum with 3 funicular segments in females. Most species (exceptions are some female Dicladocerus) with postmarginal vein <1.7x stigmal vein length.

couplet 32

aa1
sympiesis venation.JPG (9107 bytes)

Image credits: Boucek (1988).