Madison, Wisconsin: Wisconsin Department of Natural Resources
Summary
The most recent keys to genera of aquatic insects in North America appear in Pennak (1953), Usinger (1956), and Edmudnson (1959), but many taxonomic advances have been made since their publication. Increased interest in the aquatic environment has led to a demand for up-to-date keys to aquatic insects. I have attempted to fill that demand by providing generic keys to aquatic insects that occur in Wisconsin. These keys are restricted to genera that are likely to be found in Wisconsin, and treat only aquatic stages of those genera. The regional scope of the keys eliminates many genera that occur only in distant parts of North America, thus simplifying their use. Although the keys are intended for use in Wisconsin, they should also be applicable for neighboring states.