A new species of Nogunius Jaoszyski in Japan (Coleoptera: Staphylinidae: Scydmaeninae).

The genus Nogunius Jaoszyski was proposed to accommodate four species distributed exclusively in Japan: N. sokani Jaoszyski (Okinawa Island), N. aogashimanus Jaoszyski (Aogashima, Izu Islands), N. kerri Jaoszyski (Ishigaki Island), and N. fukuuzanus Jaoszyski (Okinawa Island). A female of an undescribed species collected in mainland Japan, on Shikoku, was also recorded. In the present paper we provide evidence that this interesting and apparently very rare genus occurs also on Kyushu. Nogunius sagaensis sp. n. is described, based on a single male collected in Saga Prefecture, NW Kyushu. Diagnostic characters of all nominal species are compared, and a distribution of Nogunius is summarized.