Abstract
The gross morphology of the reproductive system is described and illustrated for the male and female of Pseudaletia unipuncta (Haw.) and Peridroma margaritosa (Haw.), and comparisons are made with Heliothis zea (Boddie). Each of these species is a member of a separate subfamily, and their adults are, respectively, long-, medium-, and short-lived. The method of inserting the spermatophore is described, and both morphological and functional reproductive characteristics are compared and summarized. Mating percentages are given for feral populations.