DYTISCIDAE AND NOTERIDAE OF WISCONSIN (COLEOPTERA) .5. DISTRIBUTION, HABITAT, LIFE-CYCLE, AND IDENTIFICATION OF SPECIES OF HYDROPORINAE, EXCEPT HYDROPORUS-CLAIRVILLE SENSU-LATO

Thirty species in 11 genera of Hydroporinae were collected in Wisconsi n over the past 32 years, excluding those in Hydorporus s.l. Fourteen species of Hygrotus were found; other genera were represented by one t o four species. Species keys and notes on identification are provided for adults of all species that occur or may occur in Wisconsin. Inform ation on distribution and abundance in Wisconsin, habitat, and life cy cle is provided for each species based on a study of 34,628 adults. Li fe cycles were predominantly univoltine, with adults overwintering and larvae completing development from late spring to late summer, depend ing on the species. Most adults apparently overwinter in aquatic habit ats, except those of Laccornis and Hygrotus compar, which probably ove rwinter in terrestrial habitats.