Upper surface of forewing cell with 3 dark gray bars. Front wing has no red spots.
Females lay single eggs scattered on the host plant.
Caterpillars feed at night at the base of host plant and pupate in a loose silk cocoon above ground. Overwintering is by the egg stage. One flight in June - July. Subspecies strohbeeni from California's Santa Cruz Mountains is extinct. G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.