Last modified: Jan. 20, 2020, 10:24 a.m.
Spread all over the country but rarely plentiful. Distribution is coextensive with the range of the food plant. Hitherto a fairly common species.
Head pure white; forewings ground colour pure white with brownish pattern: a softly bent transveral line just before the middle, two striae, one costal the other from the inner margin, touching in the middle and pointing distally.
In older mines the caterpillar also eats the palissade parenchyma causing the leaf to fold over the mine and the upper surface of the leaf to change colour, sometimes to transparant whitish.
The dark brown pupa lays in a thin-walled cocoon, attached to the floor of the mine, while all the frass is concentrated in the opposite corner. The species hibertanes in the pupal stage.
Two generations a year: May and August.
The species is monophagous on Acer campestre.