On the taxonomy of the genus Agrisius Walker, 1855, with descriptions of two new species from Vietnam and Laos (Lepidoptera, Erebidae, Arctiinae).

Two new species of the genus Agrisius Walker, 1855, A. orhanti Volynkin, Dubatolov Kishida, sp. n. and A. leloii Volynkin, Dubatolov Kishida, sp. n. are described from South Laos and Vietnam respectively. A. orhanti sp. n. belongs to the A. japonicus Leech, 1889 species-group. Whereas, the male genitalia structure of A. leloii sp. n. is intermediate between those of the A. japonicus and the A. guttivitta Walker, 1855 species-groups, therefore, it is assigned to a separated species-group (the A. leloii species-group). Agrisius dubatolovi Orhant, 2012 is downgraded as a subspecies of A. japonicus: Agrisius japonicus dubatolovi Orhant, 2012, stat. nov. Female genitalia of species of the A. japonicus and most of the A. guttivitta species-groups are illustrated for the first time.