Morphology of the digestive and reproductive systems of adult Hadraule blaisdelli (Casey) (Coleoptera: Ciidae)

The gross anatomy and histology of the digestive system and the male and female reproductive systems of the minute, fungus-feeding, North American, ciid beetle, Hadraule blaisdelli (Casey), are described and illustrated. Two types of glandular tissue with possible digestive functions are found near the buccal cavity. The very large mesenteron is filled with fungus tissue and spores. The six Malpighian tubules surround the rectal sac of the proctodaeum in a cryptonephridial arrangement. Each testis is composed of three sperm tubes, and two pairs of accessory glands are present in the male. Each ovary is composed of three telotrophic ovarioles.