The queens were collected in Topeka Kansas, on July 2nd, at a botanical garden near a lake. Not really wooded, but there are plenty of trees. Really a bit of everything that's not "arid" nearby.
Several queens were collected, but I suspect all to be the same species. The one pictured is probably the largest, but there is some slight variation and size and coloration. None have noticeably larger gasters, a different headshape, or anything like that.
I'm just going to skip the rest of the description, as I think the photos are pretty decent. I can try to take some better ones if necessary. A closeup of the head would be difficult to provide.
Any chance these AREN'T a parasitic Lasius, like Lasius umbratus?