This taxonomic study on the genus Scutellathous is only recognized a species. S. porrecticollis (Lewis, 1894) in Korea. The previous record of Athous (=Medakathous) jactatus (Lewis, 1984) is revealed as the misientification of S. porrecticollis. We also describe and illustrate Subscutellathous koreanicus gen. and sp. nov. from Korea. This new genus si compared to the most closed genus Scutellathous by the basis of diagnostic characters in generic level.