Elachista subalbidella is a moth of the family Elachistidae found in Europe and North America.
The wingspan is 10–.The head is ochreous-yellowish. Forewings are ochreous yellow, towards costa sometimes fuscous-tinged. Hindwings are dark grey.[1]
Adults are on wing in June.[2]
The larvae mainly feed on purple moor-grass (Molinia caerulea), but have also been recorded on oatgrass (Arrhenatherum species), tor-grass (Brachypodium pinnatum), false-brome (Brachypodium sylvaticum), bunch grass (Calamagrostis arundinacea), American beak grass (Diarrhena americana), sedges (Carex species), melic grass (Melica species) and meadow-grass (Poa species).
It is found from Fennoscandia and northern Russia to Italy and Greece and from Ireland to Romania.[3] It is also found in North America (British Columbia, Manitoba, Nova Scotia, Ontario, Quebec, Yukon, Ohio, Pennsylvania and South Dakota).[4]