Northern Prairie Wildlife Research Center
Markings extremely variable but always some combination of yellow and black. Black dorsum often interrupted with yellow stripes. Sides yellow with short vertical bands, mostly above spiracles; usually with dark line running length of body above legs. Younger caterpillars have less black. Caterpillars are gregarious, occasionally becoming pests. Food: restricted to catalpas. Caterpillar: May through November; 2 generations in South.