Crabro carbonarius (DAHLBOM,1838); Blepharipus cinctipes (PROVANCHER,1882); Stenocrabro cinctitarsis (ASHMEAD,1901); Blepharipus columbiae (BRADLEY,1906); Crabro melanarius (WESMAEL,1852); Crabro niger (PROVANCHER,1888); Crabro nigror (FOX,1895); Crabro rugosus (HERRICH-SCHÄFFER,1841); Crabro servus (DALLA TORRE,1897); Thyreopus stygius (MICKEL,1916); Thyreopus utensis (MICKEL,1916)
A small black solitary wasp nesting in cavities in dead timber. Identification keys are given in Yeo & Corbet (1995), Lomholdt (1984) and Richards (1980). In older literature this species was referred to as Crabro carbonarius (Dahlbom), with the name C. leucostomus or C. leucostomoides being applied to the much more common Crossocerus megacephalus, so care is needed when citing older records of this wasp.
A northern species, recorded from Scotland and northern England south to Yorkshire (Archer 2002). Overseas found widely distributed throughout northern and central Europe, Central Asia and Japan.