for the ID.

observed for about 10 minutes but every ant I saw looked similar and all of the ones I was successful in imaging was the same. I take it the ant and the nest architecture don't seem congruent. I'll go back this week and get more images.

Are the current inhabitants of the nest. I wouldn't say this kind of architecture is incongruent for them, although they prefer the underside of large, flat stones. But where these are rare, then they are able to build this kind of earth mound, more typical of other genera.

are about 60 miles away so I would say this area qualifies as a hardship post for them. Thanks.

In grassy habitats, it typically builds an irregular mound 1-3 ft. (30-100 cm.) across with numerous entrances. In woodlands their mounds tend to be smaller, often against a log or stump, and the colonies less populous.

Dorymyrmex in Illinois is restricted to deep sand deposits, and builds only a small, single-entrance crater.