Potentilla erecta
The larvae feed on "Agrimonia eupatoria", "Fragaria vesca", "Potentilla anserina", "Potentilla erecta" and "Potentilla reptans". They mine the leaves of their host plant. The first part of the mine is a long, slender corridor, rather straight, often following a vein or the leaf margin. At the end, the corridor widens into a large blotch.