The genus Nipponobythus was first described by Jeannel in 1958 from Japan based on Nipponobythus syrbatoides Jeannel 1958. Löbl described the genus Machulkaia (type species: Machulkaia mirabilis Löbl 1964), but it was synonymized under Nipponobythus later. Nipponobythus holds 14 species from Korea, Japan and China. Three species (N. chilisanus, N. dolharubang and N. omissus) are currently recorded in Korea. Members of this genus can be distinguished from other pselaphine genera in having concave frons with golden pubescence in males. Here we describe a new species of Nipponobythus from Mt. Gahak, Jeollanam-do, South Korea. This new species is externally similar to N. chilisanus Nomura & Lee 1996, but has differences in male genitalia.

• Yeon-Jae Choi(Department of Biological Sciences, Chungbuk National University)
• Jong-Seok Park(Department of Biological Sciences, Chungbuk National University)