Sarimini from Vietnam: first record of the genus Tetrichina with a new species, and a new species of Dactylissus (Hemiptera, Fulgoromorpha, Issidae)

Two new planthopper species of the family Issidae, tribe Sarimini are described from Central Vietnam. <i>Dactylissus sinuatus</i> Constant & Pham, <b>sp. nov</b>. from Hon Ba Nature Reserve in Khanh Hoa Province, represents the second species of the genus <i>Dactylissus</i> Gnezdilov & Bourgoin, 2014 so far known only from Hon Ba, and <i>Tetrichina honbana</i> Constant & Pham, <b>sp. nov</b>. from Hon Ba Nature Reserve, Nui Chua National Park in Khanh Hoa Province and Ta Kou Nature Reserve in Binh Thuan Province, represents the first record of the genus <i>Tetrichina</i> Chang & Chen, 2020 in Vietnam. Illustrations of habitus and terminalia of the new species are given as well as a distribution map and photographs of live specimens and their habitat.