The forewings are blackish or dark fuscous, faintly purplish-tinged; an ochreous whitish dorsal spot hardly beyond middle; tips of apical cilia white.

It is hard to find, but it is usually approximately 10 mm nearer the petiole then where the larva enters the midrib to start the mine.

Eventually the larva remains at the feeding edge of the mine and the frass is deposited haphazardly, blocking the passage to the midrib.

[5][6] The pupa can be found from November to June, in a pale orcheous to light reddish brown cocoon, on the ground or in leaf litter.

[5][6] The moth is univoltine (i.e. one generation per year) and can be disturbed from the foliage of the larval food plant.