Didineis Wesmael 1852

Didineis Wesmael 1852: 109 . Type species: Alyson lunicornis of Vander Linden 1829 (= Pompilus lunicornis Fabricius 1798), by monotypy.

The genus is closely related to the other two genera of the tribe Alyssontini de Dalla Torre 1897: Alysson Panzer 1806 and Analysson Krombein 1985, but differs in having the labrum truncate or slightly biemarginate apically (trilobate in Analysson), the clypeal median lobe tridentate (straight in Analysson), the inner eye margins nearly parallel (moderately converging toward the clypeus in Analysson), the forewing media diverging before cu-a (at or beyond cu-a in Alysson), the metapleuron much less than half as long as high (about half as long as high in Alysson), and metasomal tergum II without lateral pale spots (with two lateral pale spots in Alysson). For a key to genera of Alyssontini see Nemkov & Lelej (2013).