Approximately 55 mm long, black in color with four yellow-orange stripes running the length of the body. They also have short spines protruding from the sides of the body. Approximately 30 mm long, black in color with 7-8 yellow stripes running the length of the body. They have a black head with a yellow-orange neck. Sides of the prolegs are orange to yellow.
White hairs arise from body.
Approximately 40-50 mm long, brilliantly colored with stripes consisting of yellow, white and black. The head is red. On the tail end, the caterpillar has a reddish-orange bump, hence the name redhumped oakworm. The information given herein is supplied with the understanding that no discrimination is intended and no endorsement by the Purdue University Cooperative Extension Service is implied. Any person using products listed assumes full responsibility for their use in accordance with current direction of the manufacturer.