Abstract
1. 1. Respiration rates of eggs of the bagworm moth, Thyridopteryx ephemeraeformis (Haworth) declined from October until March. Rates increased in the spring with the resumption of embryogenesis. 2. 2. Respiratory Q 10 values (2–12°C) varied from 3.2 to 4.5. Lipid was utilized primarily in respiration. 3. 3. Mean supercooling points (SCP) decreased from −26 to −30°C in autumn, remained low during winter and increased in the spring. 4. 4. The autumn depression in SCP was considered important for survival. 5. 5. Substantial mortality was predicted during the winter of 1984–1985. 6. 6. Glycerol and at least one other polyol were detected in eggs.
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