Two new species of the genus Nephelomilta Hampson (Lepidoptera: Erebidae Arctiinae) from China and Indonesia Author Volynkin, Anton V. 0000-0001-9447-4925 monstruncusarctia@gmail.com Author Dubatolov, Vladimir V. 0000-0001-7687-2102 Institute of Systematics and Ecology of Animals, SB RAS, Frunze str. 11, RF- 630091, Novosibirsk, Russia. & vvdubat @ mail. ru; https: // orcid. org / 0000 - 0001 - 7687 - 2102 vvdubat@mail.ru Author Huang, Si-Yao 0000-0002-9859-9212 Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, Guangdong, China. & huangsiyao 2007 @ aliyun. com; https: // orcid. org / 0000 - 0002 - 9859 - 9212 huangsiyao2007@aliyun.com Author Kishida, Yasunori 0000-0002-9305-5937 Kitazawa 5 - 20 - 1 - 103, Setagaya, Tokyo, 155 - 0031 Japan. & hitoriga 1949 @ yahoo. co. jp; https: // orcid. org / 0000 - 0002 - 9305 - 5937 hitoriga1949@yahoo.co.jp text Zootaxa 2021 2021-07-19 5004 1 58 66 journal article 10.11646/zootaxa.5004.1.2 1175-5326 5120256 4906C067-736A-4217-95E9-38A658973331 Nephelomilta diehli Volynkin & Černý, 2018 ( Figs 8–10 , 18–20 ) Type material examined . Holotype ( Figs 8 , 19 ): male, “ Indonesia , N. Sumatra , 15 km NO [NE] Prapat, HW 4, 1150m , 3.–6.I.1994 , leg. Karel Cerny [ recte Černý]” / “Slide AV2663 ♂ A. Volynkin ”: ( MWM / ZSM , ex coll. CKC ). Paratypes . INDONESIA : 1 male , same data as for holotype ( CKC ) ; 1 male , Indonesia, N Sumatra , 15 km NE Sipirok , 1350m , Lake Marsabut , 8.I.1994 , gen. prep. No. : AV2662 (prepared by Volynkin ) ( CKC ) ; 1 male , Indonesia , Sumatra , Holzweg 3, 1987, Diehl leg. ( CKC ) ; 2 males , N Sumatra , C Samosir , Toba lake , Partunghoan , 2.37 N 98.44 E , 1600 m , 20.IX.1991 , secondary forest, Graul & Schintlmeister leg. [in German ], gen. prep. Nos. : AV4144, AV4145 (prepared by Volynkin ) ( CKC ) . Additional material examined . INDONESIA : 1 male , Borneo , Kalimantan Selatan , 1100m , 30 km E Kandangan , Regenwald [rainforest], 15 km NE Loksado , 3–22.IX.1997 , Jakl leg., 2°52´S / 115°38´E , gen. prep. No. : MWM 37104 (prepared by Volynkin) ( MWM / ZSM ) . Remark . The specimen from southern Borneo Island ( Fig. 10 ) is somewhat smaller and has somewhat nar- rower forewing (the length and width ratio is 2.4:1 vs. 2.2: 1 in the Sumatran populations) with thinner pattern than the nominate populations from Sumatra . It also displays slight differences in the male genitalia ( Fig. 20 ) from the specimens from Sumatra ( Fig. 18, 19 ), viz. the somewhat narrower apical lobe of the costa, the somewhat narrower ampulla and the somewhat less elongate subbasal diverticulum of the vesica (ca. 1/4 of the phallus length vs. 1/2 of the phallus length in the Sumatran populations). Probably the population from Borneo represents a separated subspecies, but to describe it examination of additional materials is necessary. Distribution . The species is known from the islands of Sumatra ( Indonesia ) ( Volynkin & Černý 2018 ) and Borneo ( Kalimantan Selatan Province of Indonesia , a new record).