Very variable in degree of markings, with unmarked examples common.
This species was accidentally introduced to Britain around 1946 and is now established and expanding its range.
Recorded in 92 (34.1%) of the 270 2km squares of Huntingdonshire.
Last recorded in July 2023
Recorded date range (Adult): 07 January to 27 November
Recorded date range (Larva/Leafmine): 12 July to 12 July