Two new species of the genus Rhyacophila Pictet (Trichoptera, Rhyacophilidae) from Korea and Japan Author Nozaki, Takao 3 - 16 - 15, Midorigaoka, Ninomiya-machi, Naka-gun, Kanagawa, 259 - 0132 Japan. Author Park, Sun-Jin Department of Life Science, Kyonggi University, Suwon 16227, Korea. text Zootaxa 2021 2021-11-09 5067 1 97 105 journal article 3646 10.11646/zootaxa.5067.1.5 74f3ce16-7e8f-420a-b76e-d306ea2a42ad 1175-5326 5656552 4763DE40-3A0D-4F23-9381-3C4754A59AE4 Rhyacophila vicina Botosaneanu 1970 ( Figs 3 , 7 , 9 ) Rhyacophila vicina Botosaneanu 1970 , 287–288, 327, plate VII figs 1–6, male, female. Rhyacophila jirisana Kobayashi, 1989 , 4, 6, figs 3A, 3B, male. Synonymized by Nozaki et al . (2019) . Adult. Forewings each 8.5–10.0 mm in male (n = 12), 8.5–10.0 mm in female (n = 8). Ratio of width of eye to distance between eyes 0.25–0.31 in male (n = 12), 0.26–0.31 in female (n = 8). Specimens examined. KOREA : 2 males , 1 female , Kangrimchon , Chiaksan National Park , Pugok-ri , Hoengsong-gun , Gangwon-do , 19.v.2000 , T . Nozaki (net sweeping) ( TN ) ; 2 males , Jomurak Valley , Gapyeong-gun , Gyeonggi-do , alt. 410 m , 2.vi.2014 , T . Nozaki (net sweeping) ( TN ) ; 2 males , 1 female , Myeonji Mt. Valley , Gapyeong-gun , Gyeonggi-do , alt. 269 m , 2.vi.2014 , T . Nozaki (net sweeping); 1 male , 1 female , Myeonji Mt. Valley , Gapyeong-gun , Gyeonggi-do , alt. 250 m , 3.vi.2014 , T . Nozaki ( light trap ) ( TN ) ; 5 males , 5 females , Gwangchi Valley , Gaojak-ri , Yanggu-gun , Gangwon-do , 26.v.2015 , MS. Kang (net sweeping) ( SJP ) ; 4 males , Sambong National Recreation Forest , Gwangwon-ri , Nae-myeon , Hongcheon-gun , Gangwon-do , 14.v.2018 , MS. Kang (net sweeping) ( SJP ); Choamsa Temple , Jukgyegugok Valley , Baejeom-ri , Sunheung-myeon , Yeongju-si , Gyeongsangbuk-do , 1.vi.2013 , MS. Kang (net sweeping) ( SJP ) . Distribution. The Korean Peninsula ( South Korea and North Korea ), Russia (South Primorye), China ( Liaoning ).