Local in calcareous grassland, heathland, moorland, woodland rides and sand-dunes throughout much of the British Isles. In Hampshire and on the Isle of Wight widespread and locally common in two different habitats, chalk downland and heaths. Wingspan 20-23 mm. Fairly unmistakable. Larva feeds on Common Milkwort and Heath Milkwort, over-wintering as a pupa.