I don't know what kind it is, but I found 2 of them today during my internship in Saukville, WI. The top stripe is very blueish/gray in color, right? One thing we noticed is kind of a checkerboard pattern just behind their heads on the bottom few scales. They are much bigger than butler's and one of them bit me, so beware. haha.

We also found a very reddish looking butler's in the same area. I also did not have a camera, but will be working at that site for the next 2 years... hopefully I can find one again and get a pic.