[3] It is almost the same in colouring as Eilema griseola and Eilema lurideola[3] but the forewings are much smaller, the outer margin is oblique, only slightly excurved; the colour is much lighter, more yellowish grey, so that the pale yellow costal stripe is less prominent.

Hindwings are very pale, scarcely darker at the costal margin, with the apex much more pointed than in the two species mentioned, with which it might be confounded.

is a form with the forewing dusted with grey close to the distal margin and of a pale bright yellow ground colour in the male - ab.

is considerably smaller, and, except for the bright yellow thorax, entirely white on the upperside; it occurs among ordinary specimens.

[3] The larvae mainly feed on algae, especially on green films of Pleurococcus and on a variety of lichens growing on rocks,[1][3] but also on the flowers of broom (Genista sp.