This species was first discovered in London in 1989. It is slowly spreading through the Southern counties.
The larvae create large mines, often several in one leaf.
Recorded in 35 (13%) of the 270 2km squares of Huntingdonshire.
Last recorded in November 2021
Recorded date range (Adult): 03 May to 10 November
Recorded date range (Larva/Leafmine): 16 August to 30 November