Northern Prairie Wildlife Research Center
Distinctive white and black caterpillar. Dorsum of first 8 abdominal segments with short medial black tufts and conspicuous subdorsal black lashes on first and seventh abdominal segments. Gregarious until last instar. Hair allergenic to some people. Food: prefers hickories, walnuts, and related plants but accepting most any shrub or tree. Caterpillar: July to September; 1 generation.