I've been keeping an eye out for the strange red-headed Camponotus cf. pennsylvanicus which appeared along a path which I walk often. I haven't seen one of their workers since I collected that damaged major last week. There is a nearby cluster of trees which I suspect must contain their nest, but like I've said, no luck finding them so far. What I have found in these trees are what I believe to be Camponotus herculeanus workers. This specimen is 9mm long. Collected in Madison, ME, near the edge of lake Wesserunsett (elevation is approximately 375').
I think their proximity to the red Camponotus I encountered earlier is coincidental. The hair coverage of the worker above seems to match C. herculeanus perfectly, while the red major I found is akin to C. pennsylvanicus: