Last modified: March 25, 2021, 12:06 p.m.
A very rare and local species, after more than 60 years absence found again in OV and LI.
This species has dark grey-brown forewings. Only the costa line is broad and white. The other longitudinal lines are very narrow.
Wingspan is 10–12 mm.
The antennae are very clearly ringed alternately black and white till the tip.
The caterpillar lives in a case made from a seed. It is 4–5 mm long.
The mouth angle is 20–30°.
See also bladmineerders.be.
The eggs are deposited on a flower of the food plant.
At first de small caterpillar lives invisibly in a flower or a seed, eating there. Later it cuts a seed loose to live in.
The full-fed larva leaves the host plant, hibernates, and pupates within the case in springtime.
The adults fly in June and July.
Monophagous on Juncus bufonius.