Natural History: P. pennsylvanica is a generalist predator of small, soft-bodied invertebrates. I once found about 30 workers feeding on a smashed beetle larva under a rock. Colonies are small, rarely containing over 100 workers. Alates may be encountered, usually flying near trees, on clear late summer days.
Found most commonly in these habitats: 1 times found in standing tree trunk debris, 1 times found in mixed broadleaf, hemlock woods, 2 times found in Sand Pine/Oak Scrub, 1 times found in pine/oak managed forest, 2 times found in laurel thicket, mixed conifer/broadleaf forest, 1 times found in managed broadleaf forest, 1 times found in mixed pine hardwood forest, 1 times found in oak pine forest, 1 times found in pine-hemlock-northern hardwoods forest, 1 times found in Pinus strobus forest, ...
Collected most commonly using these methods or in the following microhabitats: 3 times Winkler, 2 times Pitfall trap, 4 times search, 1 times basal tree hole of large elm, 2 times Berlese, 1 times carrion trap (squid), 1 times sawdust under slab with Passalus, 1 times sifting litter upland hardwood, 1 times berlese cave
Elevations: collected from 5 - 2000 meters, 562 meters average