This one has me puzzled. While obviously not Exoneura, I am unsure of the genus to which he belongs. There is something about the shape of the head that makes me think of Leioproctus obscurus, but the thorax of that species is usually hairier. If you manage to get a clear picture of the wing venation that might help narrow down the possibilities.
Hello Michael. I have added a new sighting for these bees, sighting 4506408. These were the best views of the wings I could find. I'm afraid they're not great, but perhaps they will help.