Northern Prairie Wildlife Research Center
Chalky green, without hair. Dorsum of second and third thoracic segments with paired red knobs, these black at base. Eighth abdominal segment with unpaired dorsal yellow knob. Sides of body with black spots rimmed with blue. Anal proleg with blackened C-shaped marking. Anal plate decidedly yellow-green. Food: cherries, magnolias, sassafras, spicebush, tulip-tree, buttonbush, ashes, lilacs, and others. Caterpillar: May to September; 2 generations in South, 1 in North.