Abstract
The genus Hampsonascia Volynkin, 2019 is restored from the synonymy with the genus Sesapa Walker, 1854 and subdivided into two species-groups. Five new species are described: H. thaifascia sp. n. (N Thailand), H. phukha sp. n. (N Thailand), H. vanlanga sp. n. (N Vietnam), H. saldaitisi sp. n. (С Vietnam) and H. aulaca sp. n. (N Vietnam). A new combination is established: Hampsonascia dentifascia (Hampson, 1894), comb. nov. Adults together with male and female genitalia are illustrated.
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