Przyczynek do poznania wybranych grzebaczowatych (Hymenoptera: Sphecidae) z północno-wschodniej i południowej Polski

A contribution to the study of some digger wasps (Hymenoptera: Sphecidae) from the north-eastern and southern Poland. Digger wasps (Sphecidae) are represented in Poland by 247 species, with the occurrence of four of them being questionable and requiring confirmation. Authors present the first locality of Sceliphron destillatorium (Illiger, 1807) in the Masurian Lake District and in the Eastern Sudetes and another locality of this species in the Western Sudetes. In addition, we show a new locality of Sceliphron curvatum (Smith, 1870) from the Western Sudetes, further localities of Isodontia mexicana (de Saussure, 1867) from Wrocław and Podalonia luffii (Saunders, 1903) from the Masurian Lake District.