rather common species in Belgium, although populations have declined because of the Dutch elm disease.
larva lives on Ulmus.
It makes a long mine between
two veins on the underside of the leaf, often from midrib towards leaf edge.
Pupation in a sturdy light brown cocoon attached to the lower epidermis. The
pupa of the second generation hibernates.
adults fly in two generations a year: during May and August.
mine: underside of the leaf, long and narrow tubelike between two veins, often
extending to the edge of the leaf. Lower epidermis with several strong
creases. Frass in a pile in one corner of the mine. Brown cocoon.
Brabant, Louvain-la-Neuve, 17 November 2006.
mine on Ulmus
- view upperside
(Photo © Chris Steeman)