Beneath stone in diffuse silk. Shaded area beneath Calocedrus & Quercus, at base of eroding granite face.
The abdomen appeared to have sparse iridescent setae.
https://bugguide.net/node/view/2312062
What is the white, wrapped around the spider? Additional photos show more of the (likely) Eurema floricola being eaten, and the flower of the plant where this occurred.