Last modified: Jan. 21, 2020, 1:38 p.m.
A very rare species, mainly recorded from the south of Belgium.
The forewings are ochreous, often with a greyish shine. The longitudinal lines are pure white. A white costal line till 5/6 of the wing. There are blackish brown dots at the basis till half of the wing.
Wingspan is 12–15 mm.
The antennae might be unicoloured but mostly they are ringed.
The larvae live in a 5–6 mm long, tri valved, dark brown, silken case. The early case is light brown but changes rather quickly into dark brown. Therefore it is hard to find between the seed heads of the plant which have the same colour.
The mouth angle is 40–70°.
See also bladmineerders.be.
The eggs are deposited on the flowers of the host plant.
The adults are on the wing from the end of July till the beginning of September.