About Thyridanthrax fenestratus (Fallén, 1814)
Thyridanthrax fenestratus (Fallén, 1814) is a Palearctic species of bee fly belonging to the family Bombyliidae. It is distributed across the entire Palearctic region: its range covers all of Europe, extends through Greece, Turkey, Azerbaijan, and Tajikistan, and reaches as far east as China. The larvae of this species are parasitoids of the pupae of Pemphredon fabricii.