Last modified: Feb. 19, 2021, 1:42 p.m.
An uncommon species in Belgium.
Dark yellow with green intestinal contents, has a brown head and a small gray spot on the prothorax, mines venter-upwards.
It's a long irregular gallery with the frass at first in a thin central line, later it becomes broader and very variable in pattern, often several mines in one leaf. Pupates in a dark reddish brown cocoon.
See also bladmineerders.be
The adults fly in two generations a year: during May and again in August.
The monophagous larva makes a leafmine on Alnus glutinosa.