alpha,alpha-trehalose + H2O = alpha-D-glucose + beta-D-glucose It is incorporated into the wall of the spermatophore. Bean-shaped accessory glands (bags). It is increased from 1 to 2 days after adult ecdysis, but decreased after 4 days. It is dependent on ecdysteroid hormone during pupal stage. Belongs to the glycosyl hydrolase 37 family.