Crabro signatus (PANZER,1798); Crabro monstrosus (DAHLBOM,1845); Crabro confusus (SCHULZ,1906)
A scarce yellow-marked Crossocerus, closely resembling the relatively frequent C. dimidiatus, but typically with entirely yellow tibiae. This species has been variously assigned to the genera Crabro and Cuphopterus in older literature.
Recorded widely, though sparingly, across England, with one record from Scotland (Murroch Glen, Dunbartonshire, 1903). Abroad, known from central Europe and the Caucasus (Lomholdt, 1975-76).