On the systematics of the genus Synanthedon Hübner, 1819 sensu lato (Lepidoptera, Sesiidae). Part II. Thamnosphecia Spuler, 1910

The genus Thamnosphecia Spuler, 1910 is restored from synonyms of the polyphyletic genus Synanthedon Hübner, 1819: Thamnosphecia Spuler, 1910, stat. rev. The genus includes ten Holarctic species, which superficially can be divided into two species groups, viz. “red-banded” and “yellow-banded”. A morphological description and differential diagnosis are provided. It is indicated that the host plants of the larvae of the genus are representatives of 11 botanical families.