Crambus hamella is a species of moth in the family Crambidae described by Carl Peter Thunberg in 1788.[1] It is found in most of Europe (except the Iberian Peninsula and most of the Balkan Peninsula),[2] east to the Russian Far East (Amur, Sakhalin) and Japan.[3] It is also found in North America, including Alberta, Arizona, Manitoba, Michigan, Oklahoma and Ontario.[4]
The wingspan is 18–23 mm.[5] The forewings with apex slightly produced; brown, posteriorly whitish-sprinkled, terminally suffused with white ; a broad snow - white pointed median longitudinal streak from base, not reaching secondline, lower edge with a projection in middle ; second line angulated, silvery - white, anteriorly dark-edged ; a triangular white subapical spot ; several terminal longitudinal black marks ; cilia metallic. Hindwings are grey..[6]
Adults are on wing from July to August in generation per year.[7]
The larvae feed on grasses, possibly including Deschampsia flexuosa.