not so common species in Belgium.
Populations have declined because of the Dutch elm disease.
The yellowish larva makes a leafmine on Ulmus. Egg is laid on
either side a leaf.
Pupation in a dark greenish grey cocoon among leaf litter.
adults fly in two generations a year; in May and August.
mine: starts as a narrow gallery with frass in a broad line, later it
becomes more dispersed or in arches. The larval exit-hole is
on the upperside of the leaf, a feature serving to distinguish vacated
mines from the sometimes similar mines of Stigmella ulmivora.
Brabant, Louvain-la-Neuve, 17 November 2006.
mine on Ulmus
glabra - view upperside
(Photo © Chris Steeman)