this. The wing venation exhibits radial, medial, and cubital forks (R 4 branched, M 2 branched, Cu 2 branched). R 2+ 3 is strongly arched, the r-m crossvein is distinct, and the discal cell is absent. The anal vein of the wing is long. The genitalia of the male is inverted at 180° by torsion of segments 5-8.

Ecology

Adults typically remain close to the aquatic habitats where their larvae develop and are therefore infrequently observed. The larvae are easily recognized by their distinctive U-shaped resting posture, comparatively

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