Nowe dla fauny Polski gatunki chrząszczy z rodziny kusakowatych (Coleoptera: Staphylinidae)

The new species of rove-beetles (Coleoptera: Staphylinidae) for the Polish fauna. Plectophloeus rhenanus, Cilea exilis, Platystethus degener and Hypomedon debilicornis (Staphylinidae) are reported as the new to the Polish fauna. The collection data of these four species are discussed against the background of their ecology and general distribution