The
wingspan is 36–42 mm. Forewing smooth pale ochreous suffused with brown except along costa;median vein white, outlined with fuscous; the nervules towards termen whitish; the terminal interspaces with brown streaks; hindwing pure white. A coast species found in Britain, Denmark, N. Germany, the Netherlands, Belgium, France, and Spain. See also Hacker et al. Larva reddish yellow; dorsal line fine, pale with dark edges; subdorsal lines blackish; spiracles black on a pale lateral stripe; head and thoracic plate yellowish. The larvae are
monophagous, feeding exclusively on marram (
Ammophila arenaria) leaves, a plant that grows on
dunes along the shoreline. ==References==