Cynaeda gigantea (Wocke, 1871)
Large, inflated, blotch without a preceding corridor. Frass in a central mass. Pupation in the mine, cocoon in the frass clump.
distribution within Europe
At one side France and Switzerland, at the other from Hungary and Romania to Crete (Fauna Europaea, 2010).
A picture on www.lepiforum.de shows a full grown, almost black, larva.
Cynaeda mendicalis Lattin, 1951.