1. Epiproct tip variously sculptured, usually hinged; basal bar of epiproct narrow posteriorly, wide anteriorly forming cupped anchor; combs of closely set setae on posterolateral margins of terminalia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alloperlini (2)
Epiproct tip tab-like or button-like, not hinged; basal bar parallel-sided or, with reduced paragenital plates, starlike; evenly spaced setae on posterolateral margins of terminalia . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Chloroperlini: Haploperla brevis
2. With dusky, pale or no markings on head, nota, abdomen; transverse ridge absent on tergum 9 of male; epiproct tip usually not extending anteriorly beyond tergum 10; subgenital plate of female appearing to arise near posterior margin of sternum 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . Alloperla
With various pronounced dark markings on head, nota, dark abdominal stripe; transverse ridge on tergum 9 of male (in eastern Nearctic); epiproct tip usually extending anteriorly beyond tergum 10; subgenital plate of female obviously based centrally on sternum 8 . . . . . . . . . . . . . . . . . . . . . Sweltsa
Key to the Adult Chloroperlidae of Ohio to Genus