Current list of the Polish digger wasps (Hymenoptera, Spheciformes)

The present study brings together the scattered knowledge on species of Spheciformes known from Poland. The study is based on available literature data, as well as unpublished information from the authors' and other private collections data since 2004. The list includes 247 species, with 243 taxa well documented and another 4 either doubtfully recorded or requiring further research. The following species have not been confirmed since 2004: Alysson pertheesi Gorski, 1852; A. ratzeburgi Dahlbom, 1843; Ammoplanus hofferi Snoflak, 1943; A. pragensis Snoflak, 1945; Bembecinus hungaricus (Frivaldszky, 1877); Crabro lapponicus Zetterstedt, 1838; C. loewi Dahlbom, 1845; Crossocerus denticrus Herrich-Schaeffer, 1841; C. walkeri (Shuckard, 1837); Dryudella femoralis (Mocsary, 1877); Ectemnius schlettereri (Kohl, 1888); Harpactus exiguus (Handlirsch, 1888); H. formosus (Jurine, 1807); Hoplisoides punctuosus (Eversmann, 1849); Mimesa crassipes A. Costa, 1871; M. vindobonensis Maidl, 1914; Mimumesa spooneri (Richards, 1948); Nitela fallax Kohl, 1884; Nysson variabilis Chevrier, 1867; Pemphredon flavistigma Thomson, 1874; P. mortifer Valkeila, 1972; P. podagrica Chevrier, 1870); Polemistus abnormis (Kohl, 1888); Spilomena curruca (Dahlbom, 1843); S. differens Bluthgen, 1953; S. mocsaryi Kohl, 1898; S. punctatissima Bluthgen, 1953; Trypoxylon kolazyi Kohl, 1893 and Prionyx subfuscatus (Dahlbom, 1845). On the other hand, during 2004-2021 the following species were recorded for the first time for the Polish fauna: Crossocerus subulatus (Dahlbom, 1845); Diodontus insidiosus Spooner, 1938; D. medius Dahlbom, 1845; Lindenius parkanensis Zavadil, 1948; Nysson distinguendus Chevrier, 1867; Nysson hrubanti Balthasar, 1972; Passaloecus pictus Ribaut, 1952; Psenulus chevrieri (Tournier, 1889); P. meridionalis Beaumont, 1937; Tachysphex austriacus Kohl, 1892; T. jokischianus (Panzer, 1809); T. nigripennis (Spinola, 1808); T. nobilis (Straka 2016) and Sceliphron caementarium (Drury, 1773). In the present paper another five species are newly recorded from Poland, namely: Ammoplanus gegen Tsuneki, 1972; A. kaszabi Tsuneki, 1972; Cerceris hortivaga Kohl, 1880; Crossocerus denticoxa (Bischoff, 1932); and Isodontia mexicana (de Saussure, 1867). The publication also contains remarks to red list of threatened animals in Poland (Skibinska 2002).