Northern Prairie Wildlife Research Center
Coloration variable, ground color dark with broad yellow to orange stripes and abundant downy, pale hair. Head dark brown, vertex often with paler chestnut spot. Dorsum with 4 yellow to orange stripes, vague in some individuals. Medial black wart on first abdominal segment nearly twice size of wart on eighth segment. Solitary in leaf shelter by day. Food: willows and poplars. Caterpillar: June to September; 2 generations.