([Denis & Schiffermüller], 1775)Wingspan 26-34 mm.
The males of this species have distinctively long and narrow forewings, the females being more normally proportioned.
The moth inhabits woodland and marshy fenland, and flies at night in June and July.
The larvae feed on hemp agrimony (Eupatorium) mostly, but also other plants.
It occurs in the southern half of England and in Wales.