Westwood 1846
Diagnosis (Adapted from Webb et al., 1975): Wings with clear background color, crossveins lightly margined. Apical band reduced to many small pale spots. Pterostigmal band forked but not continuous, broken posteriorly with pale spots. First and second marginal spots absent. Male terminalia pale yellow with ninth tergum emarginate. Genital bulb ovate with broad basistyle. Dististyle short and lobed. Hypovalve elongate, reaching distal quarter of basistyle. Ventral paramere narrow, unbranched, barbed, sharply curved and usually crossing distally.

P. nebulosa is widely distributed in eastern North America including much of Ontario. It is common in a wide range of woodland habitats in Ontario from June to July.