The streaked ethmia moth (Ethmia longimaculella) is a moth in the Depressariidae family. It is found from southern Canada and the northern United States east of the Rocky Mountains. In the Midwest, the range extends south to Texas. The larvae feed on Lithospermum species, including Lithospermum officinale and Lithospermum latifolium. Larvae have also been reared from Onosmodium hispidissimum.