I honestly hadn't considered Camponotus modoc, because Ontario would be very far east for this species. Antmaps.org says that it has records of C. modoc in that area, but they don't have citations yet, so I am not really convinced. I can't see the finer details that would confirm Camponotus pennsylvanicus, so now I am only 90% sure.
It is absolutely not Formica or Lasius, at least.
Edited by Batspiderfish, September 5 2016 - 6:35 PM.
If you've enjoyed using my expertise and identifications, please do not create undue ecological risk by releasing your ants. The environment which we keep our pet insects is alien and oftentimes unsanitary, so ensure that wild populations stay safe by giving your ants the best care you can manage for the rest of their lives, as we must do with any other pet.
Exotic ants are for those who think that vibrant diversity is something you need to pay money to see. It is illegal to transport live ants across state lines.
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Black lives still matter.