The impressive looking "stinger" on the end of the abdomen is actually just used for laying eggs. The female pokes it into rotting wood and lays her eggs, which hatch into larvae that look alot like caterpillars.

It is indeed a female U. californicus (orange wings, all-black abdomen). I'm envious. In all my years in Oregon I never once saw one of these alive. They must be like buprestids: emerge briefly in large numbers such that if you aren't in the neighborhood that day, you would never know they existed:-)