Richard South, The Moths of the British Isles Second Series… (1909)
“ In colour the moth is whity brown, more or less dusted or clouded with dark grey; except in the darker forms, three irregular black lines on the fore wings, and two on the hind wings, are clearly seen. It flies at dusk in June and July, and sits by day on lichen-covered rocks.The caterpillar is pale ochreous brown, with irregular dark brown lines. It feeds on ling (Calluna) and crowberry (Empetrum) from September to May; but when eggs are obtained, the caterpillar hatching from them may be kept on chickweed, knotgrass, etc., and the moth be reared the same year. ”
