1. Department of Entomology, 6124 Comstock Hall, Cornell University, Ithaca, New York 14853 USA
2. Mushroom Research Division, National Institute of Horticultural and Herbal Science, RDA, Suwon, 441‐707, Korea
3. Department of Agriculture and Life Sciences, Hirosaki University, 3 Bunkyo‐cho, Hirosaki, Aomori, 036‐8561, Japan
4. Ishikawa Prefectural University, 1‐308, Suematsu, Nonoichi‐machi, Ishikawa, 921‐8863, Japan
5. Department of Botany, National Museum of Nature and Science 4‐1‐1 Amakubo, Tsukuba, Ibaraki, 305‐005, Japan
6. Animal and Plant Health Inspection Service, USDA, Beltsville, Maryland 20705‐2350 USA
7. 2082 Cordley Hall, Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331 USA