Last modified: Jan. 6, 2020, 2:50 p.m.
A very rare and fairly local species in Belgium whose distribution appears to be limited to the eastern part of the country and that has been found more frequently since 2004.
This species has a lighter yellow stripe along the costa of the forewing and also a darker blotch from the centre of the wing to 2/3 of the distance to the tip. The rest of the wing is lighter brown. The wingspan is 12–16 mm. The antennae are ringed distinctly, alternating dark brown and white till the tip.
The caterpillar makes an untidy and bivalved lobe case of about 7–8 mm. The mouth angle is 90°.
See also bladmineerders.be.
At first, especially the tips of the leaves are mined.
The larvae are fully grown around June. Pupation takes place in the case attached to a stem of the food plant, often rather high in bright sunlight. The cases can be found starting from September. The caterpillars overwinter in their cases on the food plant.
The adults fly in one generation a year from the end of June till the beginning of August.