Endangered (proposed as a future Red Data Book species) on waste ground, damp heathland and mosses in parts of southern England, Wales, Scotland and western Ireland. Not recorded in Hampshire or on the Isle of Wight to date. Wingspan 11-13 mm. The blackish grey suffusion at the middle of the outer margin of the median fascia and the grey suffusion in the distal half of the forewing are characteristic [Bradley]. Larva feeds within stems of Water-plantain, Lousewort and Flowering Rush.