I haven’t taken the time to get a firm identification on this little bee, and the picture isn’t really good enough for a definitive ID in any case. I’m pretty sure, off the top of my head, that it is a leaf-cutter bee in the genus Megachile. The mountain mint (Pycnanthemum muticum) is at its peak (which lasts for a good long while, actually) and the bees are all over it, particularly when the sun is shining on it. That’s good for photographing them, of course, as the more light the easier it becomes, but it does mean I’m working in the bright, afternoon sun. Still, it’s one of my favorite things to do on a Saturday.