Northern Prairie Wildlife Research Center
Body bright green with pink or black spotting and numerous short, pale setae. First 8 abdominal segments with yellow spiracular stripe. Spiracles pink or red. Intersegmental areas yellow especially dorsally. Last segment with oblique yellow line above proleg. Food: many forest trees. Caterpillar: all months in South, where there are as many as 3 generations; June and July in North.