Thought I knew what it was, but my attempt to id someone else's bee failed so I'm unsure. The coloration is different from the first Anthidium manicatum I submitted as the yellow stripes on the abdomen are disjointed, and it lacks the distinctive yellow stripes on the side and end of the thorax. In any case it's an Anthidium? species I think. Not sure if the yellow mark just behind the head on the thorax is pollen or not.