Thyridanthrax fenestratus is a Palearctic species of bee fly in the family Bombyliidae. It is found throughout Europe, through Greece and Turkey, Azerbaijan, Tajikistan and across the Palearctic to China in the East Evenhuis N. L. & Greathead D. J. 2015. World catalog of bee flies (Diptera:Bombyliidae). Revised September 2015. onlineVerrall, G. H., 1909 Stratiomyidae and succeeding families of the Diptera Brachycera of Great Britain British flies Volume 5 London : Gurney and Jackson, 1909.BHL Full text with illustrations The larvae are parasitoids of Pemphredon fabricii pupae. Description Black. Head slightly prominent, tawny with whitish hairs. Fron with tawny hairs at the front. Antennae: first segment reddish, second and third dark brown. Back of the eyes white. Thorax with tawny hairs at the front and sides; scutellum dark reddish with a broadly black base. Wing: front half brown, with pale yellowish spots at the base and on the cross veins; back half glassy, iridescent. Abdomen: base with white hairs on the sides; tergites III-IV with a broken white band along the middle, tip white. Length 8-12 mm. Seguy, E. 1927 Faune de France 13: Diptères (Brachycères) (Stratiomyiidæ, Erianidæ, Cænomyiidæ, Rhagionidæ, Tabanidæ, Codidæ, Nemestrinidæ, Mydaidæ, Romoyiidæ, Therevidæ, Omphralidæ) Lechevalier editions (Paris: Éditions Faune de France)
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External links Van Veen