Last modified: April 23, 2019, 12:44 p.m.
A very local species.
The forewing is ochreous and little sickle-shaped. There are three silver stripes on the wings.
Wingspan is 16–21 mm.
The antennae are fully white or slightly ringed, there is a tuft at the base of 1/6 length of the antennae.
The final straw-colored case is about 11 mm long.
The mouth angle is. 25°.
See also bladmineerders.be.
The eggs are deposited on a flower of mainly Thymus.
The larva begins its life by eating out the ripe fruit of a floret of Thymus serpyllum. Then it hibernates.
After hibernation the larva switches to grasses, making a new case made out of a mined grass leaf. Larvae from the end of August till the end of May.
The adults are mostly day-active.
The adults fly in July till in August.