Wingspan 10-11 mm.
The larvae of this species feed on various grasses, forming a mine within which the larva is able to over-winter.
The adult moths emerge in a single generation from late April to June in the south, and somewhat later in the north, from June to July. There may occasionally be the emergence of a second generation in the south.
The adult moth can be identified by its white head and in particular the extra white subapical spot on the forewing beyond the costal and tornal spots.
The moth is common throughout woodland clearings in Britain.