Extinct in the British Isles, formerly in calcareous grassland in parts of south-eastern England. During the 20th Century there were a number of records along the North Downs from Folkestone to Dorking, including several formerly strong colonies; elsewhere there were isolated records from Wiltshire, Hampshire and the Chilterns in Buckinghamshire (MBGBI Vol 9). By 1960, the species was extremely local and on the verge of becoming Extinct in the British Isles. Wingspan 38-50 mm. Larva feeds on Annual Meadow-grass, Wood Meadow-grass and other grasses.