Key to Heptagenia spp.
Couplet 3
5. Anterior femur with two flesh-coloured rings; a small black spot on thorax above hind coxa. Exp. 25-36 mm.

6. Anterior femur without flesh-coloured rings; a short black line on thorax behind anterior coxa and one to three black dots above mid coxa. Exp. 17-27 mm.