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Males

1.         Cleft (= medial depression) tapering and V-shaped. epiproct with more than one spine, or             with a posterior accessory cusp near the tip of the single spine, or with both these; sclerotized             margins of the central depression of the 9th tergite nearly parallel throughout most of their             length, broadly rounded anteriorly, the whole being irregular U-shaped.  Zealeuctra fraxina

            Cleft distinctly U-shaped in anterior half. Distal portion of the epiproct one simple tapered             spine; sclerotized margins at least moderately convergent anteriorly. . . . . . . . . .Z. claasseni

Females

1.         Hind margin of the 7th sternite straight (except for the median lobe), tough sometimes with a             central spot of reduced sclerotization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Z. claasseni

            Hind margin of the 7th sternite with a central notch containing the terminal lobe . . . . . . . . . .             . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Z. fraxina

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