Upperside of wing is yellow to cream to white with pink at the margins and bases of the wings. The amount of pink can vary from covering most of the wing to being absent altogether. Form alba occurs in Missouri and is all white or white with some pink markings. Females begin laying eggs at dusk the next day in groups of 10-30 on leaves of the host plant. Eggs hatch in about 2 weeks and feed gregariously when young.
Older caterpillars feed alone.
Fully-grown caterpillars pupate and overwinter in shallow underground chambers. G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery. A field guide to the moths of eastern North America. Ferguson, D. C. in Dominick, R. B. et al. 1971. The moths of America north of Mexico, fasc.