Not 100% certain of this identification, but it's the closest I can get, I think. Check the third reference link for more information.
Apparently northern United States and southern Canada and west of the Rocky Mountains. But they have drifted down here to Texas, it seems.
Found on the sidewalk while walking past University of St. Thomas in Houston.
Lat: 29.74, Long: -95.39
Spotted on Oct 28, 2012
Submitted on Oct 28, 2012