Eight days ago, I caught two 9mm dealates of what I suspected to be Lasius interjectus (in Madison, ME). They both seem to be doing fine with the host workers I've given them (not yet succombing to any sort of unexplainable death) but I've noticed some peculiar features on my queens. First of all, the gaster seems rather pilose; not exactly evenly pilose (there seems to be breaks in the hair coverage that end before the edge of the previous tergum), but not simply the neat rows along the tergites, as seems common with L. interjectus.
The second thing I noticed is that the posterior of the propodeum has very few long hairs, if any, and the rest of the propodeum with relatively few long hairs. I didn't notice this as any part of a diagnostic, but I was wondering what you all make of these features. I've checked, and there are about six standing hairs on at least one half of the clypeus, so I believe it still keys out to L. interjectus. The gula has a number of standing hairs.
Unfortunately, all else I have to offer is a video, which I think at least shows the hair coverage well enough to give a good impression of the ant. It's available in 1080p, perhaps a usable resolution.