broken-barred dwarf

The wingspan is 7–8 millimetres (0.28–0.31 in).The head is dark grey, whitish-sprinkled, face paler or whitish. Forewings are blackish, somewhat paler-sprinkled; an oblique fascia before middle, in male indistinct and sometimes interrupted, a tornal spot, and an opposite costal spot (appearing together to form a perpendicular interrupted fascia) whitish, in female whiter and more distinct. Hindwings are grey. The larva is pale yellowish-grey; head black or pale brown; 2 with two black spots The larvae feed on bent (Agrostis species), bromes (Bromus species), cocksfoot grasses (Dactylis species), tall fescue (Festuca arundinacea), red fescue (Festuca rubra), soft grass (Holcus), crested hair-grass (Koeleria macrantha), annual meadow grass (Poa annua), Poa badensis, wood bluegrass (Poa nemoralis), common meadow-grass (Poa pratensis), rough meadow-grass (Poa trivialis), Trisetum ciliare and Triticum. Pupation takes place outside of the mine.