Mysterious Hole Diggers

I'm afraid to ask what these are. They look way too big to be ants.

Weird Bug

He's a little hard to see, but you can click the photo for a bigger version, and click again to magnify that. He looks like a darker blade of grass, just below and between the two clover blossoms, approximately in the middle of the frame. The only reason I noticed him is because he made quite a flutter coming in for a landing.

sent from my Android phone