Richard South, The Moths of the British Isles Second Series… (1909)
“ The caterpillar, which feeds on elm from April to June, is of a pale green, inclining to whitish green above, the raised dots white; there are three white lines on the back, the central one broader and clearer white than the others; the lines along the area of the black spiracles are whitish; head green and glossy, legs black, pro-legs greenish marked with reddish. It feeds at night, and conceals itself between leaves during the day. ”
