Phyllonorycter strigulatella
Phyllonorycter strigulatella is a moth of the family Gracillariidae. It is found in the most of Europe, east to Russia and Japan.
The wingspan is 7–9 mm. There are two generations per year with adults on wing in May and again in late July and August.
The larvae feed on Alnus incana and Alnus minor. They mine the leaves of their host plant.