A review of the subgenus Delineatia Volynkin & Huang, 2019 of the genus Ammatho Walker, 1855, with descriptions of two new species from Taiwan and Vietnam (Lepidoptera, Erebidae, Arctiinae, Lithosiini) Author Volynkin, Anton V. Altai State University, Lenina Avenue, 61, RF- 656049, Barnaul, Russia. & National Research Tomsk State University, Lenina Avenue, 36, RF- 634050, Tomsk, Russia Author Wu, Shipher Biodiversity Research Center, Academia Sinica, No. 128, Sec. 2, Academia Rd., Nangang Dist., Taipei City 11529, Taiwan. shipher @ gmail. com; https: // orcid. org / 0000 - 0003 - 2264 - 7238 text Zootaxa 2020 2020-06-18 4801 2 237 250 journal article 21639 10.11646/zootaxa.4801.2.2 a1540ced-2e09-452a-bd37-aee70242bf23 1175-5326 3900426 C8430970-E584-4B98-B515-38CD47ADA90E Ammatho ( Delineatia ) sublucana ( Volynkin & Černý, 2017 ) ( Figs 15, 16 , 27, 28 , 33 ) Type material examined . Holotype ( Figs 15 , 27 ): male, “ 14–22.VIII.2016 , N Thailand , Chiang Mai prov. , Thong Chai Range , near Doi Suthep-Pui National Park , 18°54’10.50’’N 98°51’46.05’’E , h= 700 m , secondary forest, Volynkin A. V . & Ivanova M.S. leg.”, slide AV2361 Volynkin ( Coll. NHMUK ). Paratypes : THAILAND : 1 male , 3 females , same data as in the holotype , slides AV2355 (male), AV2356 (female) Volynkin ( Coll. CAV ) ; 1 female , N Thailand , Chiang Rai , 1090 m , road 1150, km 17 from Wiang Pa Pao , 19°18’45” N , 99°23’24” E , 27. V .2011, leg. K. Černý ( Coll. CKC ) ; 6 males , 9 females , same data, but reared ex ovo, cult. K. Černý ( Coll. CKC ) . Diagnosis . Forewing length is 12–13 mm in males and 14–15 mm in females. Externally, A. sublucana resembles A. tairadiata sp. n. and red forms of A. delineata , but can be distinguished by its slightly narrower forewings, intense crimson ground color of fore- and hindwings (in A. tairadiata sp. n. and A. delineata the wings are brick red, red or tiger orange), and more elongated radial black strips in the postmedial forewing area. The differences between A. sublucana and A. trangchim sp. n. are listed in the diagnosis of the latter species. Distribution . North Thailand ( Chiang Mai and Chiang Rai provinces) ( Černý 2012 , as Barsine delineata ; Volynkin & Černý 2017 ).