Wingspan about 9mm.

Areas where the larval foodplants occur.

Adult moths can be found on the wing between May and September in the south, probably in two generations, and in July and August further north.

The larva feeds on Tufted Hair-grass (Deschampsia cespitosa) and Tall Fescue (Schedonorus arundinaceus), mining the leaf blades in a gallery from the tip downwards.

This species has a scattered distributed over much of the British Isles, into Northern Scotland, and also occurs in Southern Ireland. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as local.

It appears to be uncommon in Leicestershire and Rutland, where there are few records. L&R Moth Group status = D (rare or rarely recorded).