The wingspan is 28–35 mm. It is very like Eilema morosinum (Herrich-Schäffer, [1847]) but the forewing not so elongate, and the angles not so accentuated, the costal streak broader and brighter yellow, the hindwing duller, not so transparent; the apex of the abdomen brighter yellow. On the underside the disc is very blackish iron grey, and contrasts vividly with the orange-yellow costa and the broad pale yellow marginal area. Hindwing beneath pale yellow, the costa deeper yellow; below costa a grey streak from the base.[2]
Biology
The moth flies from June to August depending on the location.
Larva blackish dorsally, with narrow lighter lines; subdorsal lines composed of small reddish yellow and white spots; lateral line interrupted, reddish yellow. The larvae feed on lichen and mosses, but also leaves of low growing plants on occasion.
^Seitz, E. in Seitz, A. Ed. Die Großschmetterlinge der Erde, Verlag Alfred Kernen, Stuttgart Band 2: Abt. 1, Die Großschmetterlinge des palaearktischen Faunengebietes, Die palaearktischen Spinner und Schwärmer, 1912-1913
