Great Basin Naturalist


Nymphs of the type or other representative species of the 22 North American Perlodinae genera are comparatively described and illustrated for the first time. The first complete generic key for the subfamily incorporates recent nymph discoveries and revisions in classification. References to all previous nymph descriptions and illustrations and major life cycle and food habits studies are given for the 53 North American species in the subfamily, and a listing of species and their current distributions by states and provinces is provided for each genus. The previously unknown nymph of Chernokrilus misnomus is described and illustrated.