Rhopalum Stephens 1829

Genus Rhopalum Stephens, 1829 Subgenus: Corynopus Lepeletier de Saint Fargeau and Brullé, 1835: 802. Type species: Crabro tibialis of Panzer, 1801 [= Crabro tibialis Fabricius, 1798 = Sphex coarctatus Scopoli, 1763], by monotypy. Diagnosis. Head and mesosoma shiny, orbital fovea indistinct or sometimes present, ocellar triangle equilateral or slightly broader than high (Fig. 4); antennomere IV conspicuously indented below in males; pronotal collar without carina; tergum I pyriform apically; pygidial plate distinctly edged, without median carina often, with mediobasal hump (Figs. 12, 14–15) (Lepeletier and Brullé 1835; Leclercq 2011).