A new species of the genus Miltochrista Hübner, [1819], Miltochrista bachma Volynkin & Derzhinsky, sp. nov. is described from the Bạch Mã National Park in central Vietnam. The diagnostic comparison is made with Miltochrista testata (Černý, 2016) described from southern Vietnam and Miltochrista lyclenoides Černý, 2016 described from central Laos. Adults, male and female genitalia of the new and both similar species are illustrated.
Two new species of the subgenus Conicornuta Volynkin, 2019 of the genus Ammatho Walker, 1855 are described: Ammatho (Conicornuta) sinocontinentalis Huang & Volynkin, sp. n. (China) and Ammatho (Conicornuta) mangae Volynkin, Huang & Derzhinsky, sp. n. (Vietnam, Vĩnh Phúc Province). The lectotype for Miltochrista convexa Wileman, 1910 is designated. Adults, male and female genitalia are illustrated.
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