Last modified: Nov. 4, 2023, 10:27 a.m.
This very rare and declining species is only known from a few places in the southern provinces in Belgium.
Native
Young larvae make a number of rather large, untidy fleck mines. The opening of the mine is a slit at the side. The mines contain little of no frass. The lower-surface opening, by which the larva has entered the mine, is irregularly roundish. Older larvae live free on the plant.
After hibernation the caterpillars are fully-grown between late April and mid-May and pupate in a cocoon near the ground.
They are active during the day and both sexes visiting flowers. They have a slow flight.
The adults fly from late June towards end of July.
The larva lives on Helianthemum nummularium.
It inhabits limestone grasslands and outcrops and chalky habitats.