Appeared to be ovipositing on several Clarkia plants. See comment for observation of eggs found in the area, possibly laid by this moth. Photo credit: NPS / Paul G. Johnson.
We watched an adult female Proserpinus clarkiae ovipositing on Clarkia and then searched the Clarkias in the area and found these eggs. The eggs may not be from the moth we were watching. Photo credit: NPS / Paul G. Johnson.