The "southern pennsylvanica" was a term I came up for black form of P. divisa that I erroneously thought that they were different strain of pennsylvanica than the northern ones due to their small size, and the fact that the black female I had never produced viable oothecae when she was housed with several divisa (I think this was due to my poor keeping condition).
Few days ago, some of the "southern pennsylvanica" nymphs I collected matured into adult males so I checked under their wings to make sure that my ID was correct. When I did that, I realized that these males weren't pennsylvanica, but were divisa so I was able to determine that these "southern pennsylvanica" were actually just a black form of P. divisa.