Last modified: March 20, 2021, 4:18 p.m.
A rather rare species in Belgium.
The forewings are whitish with ochreous-yellow veins. The wingspan is 13–17 mm. The antennae are alternately ringed brown white till the tip.
The full-grown larva lives in a black pistol case of 9 mm. The mouth angle of 80–90°. Characteristic is the presence of some ear-like flaps. (see photo).
See also bladmineerders.be.
At least after hibernation, the larvae do not mine any more, but rather cause skeleton feeding. The larvae are fully grown in early June. Pupation takes place on a twig or on the leaf.
The moths are on the wing from the end of June until the beginning of August.