Itsy bitsy my arse that's a black widow!

[3dkicker]

Picked up a tarp this moring. It had been laying on the edge of the walkway for a week or two. A large wolf spider took off across the ground and I noticed a shiny black spider on the tarp. I looked a little closer and saw the red on the belly so I poked her with the cell phone and snapped a photo. I then flipped the tarp over and sure enough two more, the third being the largest, on the other side. Cell phone doesn't take good close ups .
First time I've ever seen a black widow and I come across three of them. I've got to get me a can of spray and go on a spider hunt.