These secretions are also involved in the activation of spermatozoa and may alter
female behavior. The bulbus ejaculatorius is continuous with that of the ductus ejaculatorius. In most insects ductus ejaculatorius is single, located medially and has a cuticular cover, demonstrating its ectodermic origin (Pendergrast, 1956; Davey and Krieger, 1985;Chapman, 1998; Nijhout, 1998).