Welcome to the UW-Madison Medical Entomology Lab (MEL) Mosquito site! This site is intended to be a resource about mosquitoes in Wisconsin, the diseases they may be carrying, and science-based information on methods to keep them from biting you.4984628DSCN7274Left: A culvert is an ideal place for development of immature mosquitoes (called larvae).  All larvae require water.   Right: Mosquito feeding on human host.