A Picasso and a Chagall have been stolen from a Palm Desert gallery. The Picasso, “Femme Regardant par la Fenetre,” is a 1959 linoleum cut in shades of brown and black of a nude woman reclining and looking out a window, printed by the artist and worth about $53,000. The Chagall, a 1964 lithograph titled “The Tribe of Dan,” is a multicolored religious work in blues, yellows and reds, also printed by the artist. It illustrates one of a series of 12 stained glass windows Chagall made for an Israeli university, and is worth about $35,000.