Abstract
Data are presented on the ontogeny of flight, general locomotion, mating, feeding, and oviposition in the milkweed bug,Oncopeltus fasciatus. Activities are segregated into different times of day: flight and oviposition are most likely to occur in the afternoon and feeding and mating are most likely to occur in the evening. Oviposition occurs after flight in the life cycle of females, so that the two activities do not conflict. Mating and feeding can and do occur simultaneously. Evidence is presented suggesting that at least feeding and oviposition rhythms involve changing levels of response threshold to external and internal stimuli, supporting Kennedy's hypothesis that migration in insects involves a suppression of “vegetative” activities during migratory flight.
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