Northern Prairie Wildlife Research Center
Gray with dense charcoal spotting; striping faint if present. Head densely mottled in black with 2 white patches to either side of midline. Fifth and eighth abdominal segments slightly humped; dorsal setal bases orange and raised; first and fifth abdominal segments with pale subdorsal areas; dorsum of fifth segment darkened behind; eighth abdominal segment with oblique black line from spiracle to hump. Fringe moderately long and often tinted with pink. Food: oaks. Caterpillar: May to June; 1 generation.