Northern Prairie Wildlife Research Center
Bright green with brown-black dorsum edged with yellow, strongly humped eighth segment. Dorsal and subdorsal coloration continued onto head; cheeks pale. Setae above spiracles long, shiny black, and sparse, those on dorsum thickened. Subventral setae, shorter, pale, and more numerous. Food: apples, birches, cherries, mountain ashes, and others. Caterpillar: June to October; 1 or 2 or generations in North.