Evidence is presented for the presence of a sex attractant in femaleVitula edmandsae(Packard). The ability of the virgin female to attract the male varies with age, reaching a maximum 2 days after emergence. The pheromone-producing gland is a ring-shaped structure formed by modification of the epidermal cells in the intersegmental membrane between the eighth and ninth abdominal segments.
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Weatherston et al. (1968) studied this question.
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