1. Puerto Rican Conservation Foundation, P. O. Box 362495, San Juan, Puerto Rico 00936, U.S.A
2. The Nature Conservancy, 101 East Grand River, Lansing, MI 48906, U.S.A.
3. International Institute of Tropical Forestry, USDA Forest Service, Sabana Field Research Station, HC 02 Box 6205, Luquillo, Puerto Rico 00773-1377, U.S.A.