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1.         Epiproct present on tergum 10; sternum 9 covers much of sternum 10; sternum 8 unmodified .             . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Males (2)

            Epiproct absent, tergum 10 unmodified; sternum 9 not extending over sternum 10; sternum 8             at least slight modified to form subgenital plate . . . . . . . . . . . . . . . . . . . . . . . . .Females (3)

2.         Epiproct consists of two arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Allocapnia

            Epiproct consists of single arm  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Paracapnia angulata

3.         Wingless or very short wings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Allocapnia

            Full winged or brachypterous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Paracapnia angulata

 

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