Northern Prairie Wildlife Research Center
Bright yellow-green, elongate and somewhat flattened above with reduced prolegs on third abdominal segment. Head with numerous black spots; labrum creamy. Setae dark, from small reddish setal bases. Distal half of prolegs tinted with pink-red. Anal prolegs splayed out in V. Food: alders and basswoods. Caterpillar: June to November; 2 or more generations in South, 2 in North.