The Marsh Oblique-barred (Hypenodes humidalis) is a species of moth in the Erebidae family. It is found in most of Europe and across the Palearctic to Siberia. The wingspan is 14–15 mm.The forewing is whitish ochreous, irrorated irregularly with brown and dark fuscous. The inner line is indistinct; the outer line is irregular, oblique, dark fuscous and posteriorly whitish edged. The cellspot is small, dark, outwardly whitish edged. The subterminal line is straight, whitish, ill-defined and preceded by fuscous suffusion, running to the apex. The hindwing is grey. Adults are on wing from the end of May to the beginning of October.