vol. 38 (1981-03-30 issued)
| Freezing Resistance of Broad-Leaved Evergreen Trees in the Warm-Temperate Zone | |
| SAKAI, Akira | 1-14 |
| Freezing Resistance of Leaf of Pteridophyta Native to Hokkaido with Special Reference to the Phenology of Leaf | |
| SATO, Tomoyoshi;SAKAI, Akira | 15-22 |
| The bumblebee Fauna of the Kurile Islands (Hymenoptera: Apidae) | |
| ITO, Masao;SAKAGAMI, Shoichi F. | 23-51 |
| Some Physiological Properties Associated with Freeze-Tolerance in Diapausing Pupae of Papilio machaon | |
| SHIMADA, Kimio | 53-60 |
| Nests of Dolichovespula albida from the Arctic Canada (Hymenoptera: Vespidae) | |
| YAMANE, Seiki;MAKINO, Shun'ichi;TODA, Masanori J. | 61-68 |
| Notes on the Larval Hibernation admirabilis (Coleoptera: Coccinellidae) | |
| KOSHIKAWA, Kazuo | 69-75 |