Northern Prairie Wildlife Research Center
Light green with variously developed whitish green subdorsal stripe with wispy addorsal and supraspiracular stripes to either side. Broader, spiracular line may be pink on 2 or more segments, often continued as lateral line onto head. Back of each segment flushed yellow or red. Spiracles often orange. Caterpillars of signate melanolophia (M. signataria) are closely similar. Food: many forest trees. Caterpillar: May to September; 2 generations.