Northern Prairie Wildlife Research Center
Characteristically striped caterpillar with somewhat humped eighth abdominal segment. Head rough textured; lateral striping continued onto head. Middorsal line broad, lightened over thorax, broken into spots on anterior of abdomen, and then whitened on seventh and eighth segments. Abdomen usually with black subdorsal stripe, ending on seventh segment. Brown spiracular stripe edged with whitened stripe to either side. Food: ashes, feverwort, and fringe-tree. Caterpillar: May to June; 1 generation.