Pest description and crop damage Adult is a large butterfly, with purplish brown wings bordered with a wide yellow stripe inside of which is a row of blue or purple spots. Larvae are purplish black with a row of orange or red spots along the back. They have brownish prolegs and are clothed with long, forked spines.
For more information
Johnson, W.T. and H.H. Lyon (1991), Insects That Feed on Trees and Shrubs, 2nd ed., Cornell University Press (p. 152).