Polyergus lucidus, I think. Hoping James Trager can set me straight, if not! Found on the slopes of a giant Formica mound getting the frass knocked out of her around 3 pm. I can't imagine this queen would have made a raid against tens of thousands of workers by herself. Perhaps a nuptial flight that landed in the wrong place?? She died shortly after I plucked her out of this tense situation.