Richard South, The Moths of the British Isles… (1920)
“ It is enclosed in a long, grey-brown, tight-fitting cocoon of silk and hairs of the caterpillar, which is generally spun up among the lower twigs, or to the stem of the food plant.The moth emerges in June or July, and is on the wing at night, when it may be sometimes netted as it flies along or over hedgerows. When caught in this way it dashes about so wildly in the net that it is rarely of much value for the collection. The same may be said of examples taken by light, which at times attracts the moths freely. ”
