Abstract
While duration of life in Drosophila at different temp. follows an exponential curve, duration of life for different grades of intermittent starvation follows a logistic curve. The duration of life is not shortened by taking the larvae from the food before the end of the normal feeding period. Reduced body size does not lead inevitably to shorter life. Absence of yeast shortens life greatly. Males, but not [female][female], show shorter life when changed to new bottles daily.