Hypenodes humidalis, the marsh oblique-barred, is a moth in the family Erebidae. The species was first described by Henry Doubleday in 1850. It is found in most of Europe and across the Palearctic to Siberia.[1]
The wingspan is 14–15 mm. The forewing is whitish ochreous, irrorated (sprinkled) 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.[2] Adults are on wing from the end of May to the beginning of October.[3]
The larvae possibly feed on Juncus and/or Carex species.[4] The larvae can be found from July to May. The species overwinters in the larval stage. Pupation takes place at the stem of the host plant.