Strange Bug

Do you know what kind of insect this is?

I've been trying to find out with no success yet.

Yesterday while trimming brush, I spotted this little fella crawling along at a pretty good clip. I've not seen a bug like this, so puffy looking and that irridescent greenish/bluish color was striking.

I chased him along (no way I could slow him down), trying to get a good photo. After about 10 shots, I let him continue on his way. I don't know where he was headed, but he was certainly making good time!