The Scarlet Lily Beetles have found you. Spray with organic Bon-Neem. The Pyrethrin in the spray will kill the adult beetles on contact and the neem oil will disrupt the feeding of the larvae causing them to die before they become beetles. Spray weekly for the next three week or so until they subside. Note on a calendar when they arrived this year and start spraying next year about a week before that date…you can expect them every year once they are in your area. Without treatment, they will kill the lilies.