Northern Prairie Wildlife Research Center
Strikingly colored with alternating rows of black, white, and yellow wavy stripes. Head and first abdominal segment bright red. Dorsum of thorax and especially anterior abdominal segments with elongate black pegs, each with single apical seta. First abdominal segment humped. Gregarious. Food: many deciduous trees and shrubs including blueberries, hickories, maples, oaks, willows, and poplars; often a pest on apples. Caterpillar: May to September; 2 generations in South.