Northern Prairie Wildlife Research Center
Tan or brown with fleshy, apically forked horn on first abdominal segment. Smaller, yet still prominent protuberances on last thoracic, and fifth and eighth abdominal segments. Head with dark band from antenna to crown. Dorsum of sixth and seventh abdominal segments with whitish chevron. Food: many forest trees and shrubs, as well as roses and apples. Caterpillar: June to October; 2 generations.