A taxonomic review of Atheta Thomson subgenus Atheta Thomson in the Korean Peninsula is presented. The subgenus is represented in Korea by eight species including two new species, A. (A.) prolixa Lee Ahn, sp. nov. and A. (A.) vegrandis Lee Ahn, sp. nov. Atheta (A.) sauteri Bernhauer is reported for the first time in South Korea. A key, descriptions, habitus photographs and illustrations of the diagnostic characters are provided.
Keywords: Coleoptera, Staphylinidae, Aleocharinae, Atheta, new species, Korea.