Pale Swallowtail females generally have little desire to lay eggs in captivity for the first several days. You need to feed them every daily for about 4-5 days before setting them up in a cage. They still likely will not cooperate for a few days before finally acclamating and ovipositing on the host Ceanothus. Patience is required using this technique with glaucus-group swallowtails.

Make sure the females have plenty of room in the cage to fly onto the plant.  (Don't overcrowd the cage with too much plant.)