The dark brown outer cross-band, on the otherwise plain straw-white forewing is diagnostic. The band is pinched in two places, forming three dark brown blotches extending outwards from the cross-line. The blotch near the leading edge us only linked by a thin cross-line, but the other blotches are often merged. There is a conspicuous central dot on all four wings.
Pupates in loose earth.
Woodland rides and edges and hedgerows.
Recorded in 68 (25.2%) of the 270 2km squares of Huntingdonshire.
Last recorded in September 2020
Recorded date range (Adult): 14 May to 20 October
Recorded date range (Larva/Leafmine): 02 July to 02 July