While sitting near my family's cabins in Raccoon Street Park after dark (around around 9-11 PM), I noticed there happened to be a nuptial flight going on, with a bunch of queens and drones being drawn to the nearby electric lantern. I caught some of the queens and put them in test tube setups, where they proceeded to shed their wings (although as of this typing I only have one queen remaining; the other two drowned from leakage in their test tube setups).
The most notable thing about these ants was their size. They were extremely small; a couple of millimeters at most, maybe around the size of a large pavement ant worker. They were a dark red/brown color, with dark gasters with lighter bands. They also had prominent "waists" consisting of two segments with a point on top of each. The males were much paler in color, with smaller heads and gasters.
Body-shape wise they most closely resemble a Tetramorium species, but I wasn't aware of any Tetramorium species beyond immigrans in Pennsylvania.
Images (Apologies about the quality; all I had to use was my cellphone camera):
