The Sphecidae (Hymenoptera) of Fennoscandia and Denmark Reference:Lomholdt, O., 1984. The Sphecidae (Hymenoptera) of Fennoscandia and Denmark. Fauna Entomologica Scandinavica, 4.1: 2.URL:http://antvid.org/PDF/Lomholdt_Fauna_entom_scand%20(Sphecidae,%20Crabronidae).pdf
