Background: The genus Hypocharassus Mik, 1879 has only been recorded in the Nearctic and Oriental regions and, to date, it contains four known species.
New information: Hypocharassuscavitarsus sp. n. is described from Korea. This is the first record of this genus in the Palearctic Region. A description of the new species and a key to the Hypocharassus species are presented herein.
Keywords: Dolichopodidae; Hydrophorinae; Hypocharassini; Hypocharassus; Korea; new species.
Young-Kun Kim, Sang Jae Suh.