Bryolymnia ensina is a moth of the Noctuidae family. It occurs in coniferous forests from south-eastern Arizona (Huachuca Mountains) and south-western New Mexico (Pinos Altos Mountains) southward in the Sierra Madre Occidental to the State of Durango in Mexico. The length of the forewings is 12-14 mm and the wingspan is 25-30 mm. Adults are on wing from mid-June to mid-July.