Description of a new species of the genus Aeromachus Nicéville (Lepidoptera, Hesperiidae, Hesperiinae) from Southwestern China

A new species of the genus Aeromachus, A. angustifascia sp. nov. is described from western Guizhou Province, southwestern China. The new species is superficially similar to A. catocyanea (Mabille, 1876) but can be distinguished from the latter by the details in wing pattern and male genitalia as well as COI genetic difference. The adults and genitalia of the aforementioned taxa are illustrated.