The green forewings are 22–23 mm long,[3] with pink/purple transverse bands outlined in yellow.[5]
Male upperside
Male underside
Biology
Adults fly in one generation in winter, from December to April, during which they do not eat.[6] They are attracted to lights, but normally females will remain stationary and emit a pheromone to attract males.[6]
The caterpillars begin to pupate four to five weeks after hatching. They will pupate under leaf litter or burrow up to 16.5 cm down into the root mass of their host plants, and wait until next winter to eclose (emerge).[6]
References
^Boisduval, J.-A. (25 February 1852). "Lepidoptères de la Californie". Annales de la Société Entomologique de France. 10 (2): 319.