This species is often confused with P.purpuralis. The arrangement of the postmedian markings on the forewing to form one main golden blotch near the costa is diagnostic.
Recorded in 97 (35.9%) of the 270 2km squares of Huntingdonshire.
Last recorded in September 2020
Recorded date range (Adult): 01 February to 12 October
Recorded date range (Larva/Leafmine): 18 May to 01 November