The Fawn Brown Dart (Euxoa pleuritica) is a moth of the Noctuidae family. It is found in southern Canada and the northern United States from southern Quebec and eastern Massachusetts west to British Columbia and southern Washington. In the Rocky Mountain region it occurs as far south as northern New Mexico, north-eastern Arizona and central Idaho. The wingspan is 34–38 mm. Adults are on wing from June to August. There is one generation per year. The larvae feed on Salsola kali.