Includes bibliographical references.Two main areas of focus were examined in three experiments: the effects of mating status on male activity and the effects of crowding on female activity in the parasitoid wasp Nasonia vitripennis. The first experiment dealt with wing dispersal among lone versus crowded females. Competition appeared to make the females more likely to wing-disperse than when the female was alone. The second experiment dealt with the locomotor activity of lone versus crowded females. Competition appeared to cause females to be more active when with another female than when alone. The final experiment dealt with the locomotor activity of mated versus virgin males when exposed to a dead virgin female. Mated and virgin males appeared to be equally active.B.S. (Bachelor of Science