Mosquitoes and Tabanids in southeast Wisconsin

CDC traps and traps baited with carbon dioxide were operated for 48 h at fortnightly intervals from April to October 1972 at three sites in Kenosha County, south-eastern Wisconsin. Biting female mosquitos were collected during the evening at two of the sites. Fourteen species of mosquitos were represented in the catches, including 9 not previously recorded from the county, and 10 species of Tabanids, including 7 not previously recorded. The mosquito species recorded for the first time were Anopheles punctipennis (Say), Aedes cinereus Mg., A. communis (Deg.), A. dorsalis (Mg.), A. flavescens (Mull.), A. stimulans (Wlk.), A. triseriatus (Say), A. trivittatus (Coq.) and Culiseta inornata (Will.). A. vexans (Mg.) was the most numerous species, followed by A. trivittatus. Seasonal changes in mosquito abundance as revealed by the trapping and biting catches are described and discussed in relation to temperature and rainfall, and notes are given on the diurnal activity and habitat preferences of some of the species.