Northern Prairie Wildlife Research Center
Brown with prominent humps on first, fifth, and eighth abdominal segments. Head strongly mottled with pattern coalescing into broad diffuse band to either side of midline. Dorsum of thorax with dark patch widening toward head; dorsum of sixth and seventh segments with pale chevron. Food: many shrubs and trees, including oaks, birches, and hickories. Caterpillar: May to October; 1 or 2 generations.