Northern Prairie Wildlife Research Center
Heavily mottled in grays and white, body thickening to fifth abdominal segment; usually with dark saddle between fifth and sixth abdominal segments. Head often with orange spot to either side of midline; thin black band from antenna over top of head. Dorsal stripe whitish, more defined rearward, often including diamondlike spots. Setal bases orange over dorsum. Neither fifth nor eighth segment bear prominent warts. Fringe short and whitish. Food: oaks. Caterpillar: May to June; 1 generation.