INTERNAL REPRODUCTIVE-SYSTEM OF THE ADULT MALE LESSER MEALWORM ALPHITOBIUS-DIAPERINUS (COLEOPTERA, TENEBRIONIDAE)

The adult male reproductive system of the lesser mealworm consists of paired testes (each with six follicles), vas efferens, vas deferens, t wo pairs of accessory glands (bean-shaped and tubular), ejaculatory du ct, and aedeagus. The accessory glands closely resemble those of Teneb rio molitor L. and are thought to play a role in spermatophore formati on. Seven days after adult emergence the follicles of the testes conta ined motile sperm. Males had completely tanned by five days and initia ted mating with females seven days after emergence.