the length of the forewings is 8.4-11.7 mm. the ground color of the forewings is divided by longitudinal line and is dark gray on the costal half and whitish gray on the dorsal half. there are several black spots. the ground color of the hindwings is pale to dark gray. adults are on wing from february to october. there are multiple generations per year. adults rest by day along the midrib of the a leaf of their host plant, resembling a bird dropping.