I am attaching a couple of pics of a ?bee? I have in my garden. I have never seen one like it before. Main attention getter is the size, it's over 2 inches long!!!! Shape could be a wasp of some kind, but it appears hairy which would lead me to think it was a bee. It is a ground nester. There are dozens of holes with the telltale dirt pile beside them, in my bean row. The holes are big enough to easily insert my thumb. I tried to get a better pic, but after days of following him around, I have never seen him land or go into the holes. He does seem to be protecting them, but is not aggressive to me. Actually, I have seen two or three of them, but mainly just one.