1. University of Maine, School of Biology and Ecology, 5722 Deering Hall, Orono, ME 04469.
2. Cooperative Extension, 305 Deering Hall, Orono, ME 04469.
3. Current address - George Stevens Academy, 23 Union Street, Blue Hill, ME 04614.
4. Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543.
5. Trustees of Reservations, 200 High Street, Boston, MA 02110.