1. Department of Zoology and Genetics, Iowa State University, Ames, IA 50011, USA
2. Department of Ecology and Evolutionary Biology, Cornell University, NY 14853, Ithaca, USA
3. Department of Biology, University of Portland, Portland, OR 97203, USA
4. Harpswell, ME 04079, USA
5. I. C. T. Nisbet and Company, 50 Alder Lane, North Falmouth, MA 025561, USA