Thirteen new species of genera Dichomeris Hübner, 1818 and Helcystogramma Zeller, 1877 (Lepidoptera, Gelechiidae, Dichomeridinae) with twenty-one newly recorded species from Vietnam Author Park, Kyu-Tek BioResource and Environmental Center, Division of Life Sciences, Incheon National University, Incheon, 22012 Korea Author Bae, Yang-Seop 0000-0001-7356-5633 BioResource and Environmental Center, Division of Life Sciences, Incheon National University, Incheon, 22012 Korea & https: // orcid. org / 0000 - 0001 - 7356 - 5633 Author Zhao, Shengnan College of Life Sciences, Nankai University, Tianjin 300071, P. R. China Author Li, Houhun College of Life Sciences, Nankai University, Tianjin 300071, P. R. China text Zootaxa 2020 2020-08-03 4821 3 435 461 journal article 8728 10.11646/zootaxa.4821.3.2 a9792973-949f-4327-82ad-8a38612624b4 1175-5326 4400933 E831BB59-C95B-4C30-B827-131723233045 14. Dichomeris polygona Li & Zheng, 1996 ( Fig. 22 ) Dichomeris polygona Li & Zheng, 1996: 243 . TL: China ( Fujian , Jiangxi , Sichuan ). Material examined: VIETNAM : Ninh Binh Province : 22♂ , 3♀ , Cuc Phuong Nat. Park , 300 m , 30 iv –02 v 2005 , leg. KT Park & SR Kim , gen. slide nos. nklep016( ♂ ), nklep017( ♀ ) ; 4♂ , 1♀ , same locality, 200 m , 22–23 iv 2006 , leg. Park , Kim & Kang , gen. slide no. nklep020( ♂ ) ; 1♀ , same locality, 11–12.vi.2004 , leg. K. T . Park & N. Cuong , gen. slide no. CIS-6720 . Vinh Phuc Province : 4♂ , Tam Dao Nat. Park , 950 m , 26.iv.2006 , leg. Park , Kim & Kang , gen. slide no. nklep014 ; 1♂ , same locality 1000 m , 05 v 2005 , leg. KT Park & SR Kim , gen. slide no. nklep021 ; 2♂ , 1♀ , same locality 950 m , 24–25 v 2007 , leg. KT Park , gen. slide no. nklep010( ♂ ) ; 1♂ , same locality, 985 m , 01–07 v 2012 , leg. JB Heppner. Distribution. Vietnam (new record: Ninh Binh , Vinh Phuc ), China ( Fujian , Jiangxi , Sichuan ).