1. Department of Entomology and Wildlife Ecology; University of Delaware; 251 Townsend Hall Newark Delaware 19716 USA
2. Northeast Regional Office; U. S. Fish and Wildlife Service; 300 Westgate Center Drive Hadley Massachusetts 01035 USA
3. Office of Research and Development; National Health and Environmental Effects Research Laboratory; Mid Continent Ecology Division; U. S. Environmental Protection Agency; 6201 Congdon Boulevard Duluth Minnesota 55804 USA
4. Department of Ecology & Evolutionary Biology; Center for Conservation and Biodiversity; University of Connecticut and Institute of Biological Risk; 75 North Eagleville Road, U-43 Storrs Connecticut 06269 USA
5. School of Biology and Ecology and Climate Change Institute; University of Maine; 200 Clapp Greenhouse Orono Maine 04469 USA