Northern Prairie Wildlife Research Center
Grayish to charcoal with tan to yellow middorsal and sometimes faint subdorsal stripes. Top of head, frontal triangle, and jaws black or pale and mottled; red patches over vertex; and area around triangle often grayed or whitened, without dark pigmentation. Thoracic hair tufts each with 1 very long black seta that extends forward about head. Dorsum with tannish or orangish patches on first 7 abdominal segments; eighth segment with square of raised warts, anterior pair often darkened. Long, soft white setae along sides. Food: cherries and especially oaks. Caterpillar: May to October; 2 or more generations.