It is one of the few species of Lepidoptera known where this extreme of brachyptery involving both sexes has evolved.

There is a slightly larger concentration of dull white scales at the apex and extending a short distance along the costa.

They cling firmly to the bare rock, lichens and small plants in exposed situations and were only seen to move when disturbed, and then reluctantly.

Several small (3.5–4.2 mm long) mature larval cases, some with pupal exuviae attached were collected under lichen covered rocks.

These cases are mostly white, speckled with small grains of sand and minute, dark fragments from the rocky substrate.