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It looks like an argenitine ant worker to me.

Crematogaster sp.

Lasius alienus queens are a couple millimeters smaller than Lasius neoniger queens and are darker. The workers are also smaller and darker. They also often nest in wooded areas.

BTW I believe species name is lowercase. Ex. Lasius flavus not Lasius Flavus

Time for an upgrade!

That only works for Solenopsis, however. There is no such indication for a lot of northern species.

Black light traps.

Possibly Lasius claviger