Richard South, The Moths of the British Isles Second Series… (1909)
“ In the majority of specimens the purplish, or grey-brown fore wings, are more or less reddish tinged throughout, but occasionally the outer marginal area is free of this tint; the orange red marks on the central and basal areas are brighter in some specimens than in others.The caterpillar, which feeds on sallow, osier, willow, and probably poplar (a chrysalis having been found in a curled leaf of black poplar) , is a long, rather thin, greenish creature without any distinct markings, except that when full grown the front rings have two black spots. ”
