Description of the female of <i>Hyptioxesta magadanica</i>, with notes on the occurrence of <i>H. magadanica</i> and <i>H. penthima</i> adults (Lepidoptera, Noctuidae)

The previously unknown female of the noctuid moth Hyptioxesta magadanica (Kononenko, 1981) is described and compared with other Hyptioxesta species. The H. magadanica female is brachypterous, unlike the females of the other two species included in the genus. The female genitalia of H. magadanica and the adults of all three species are illustrated. Notes on the flight behaviour of the adults of H. magadanica and H. penthima (Erschoff, 1870) are given and their habitats are illustrated.