I'm starting to wonder if the ants that overthrew the reigning boof heads didn't hatch from the eggs I raided from those miscellaneous ants some while ago. A few signs indicate this, but I've yet to confirm it. For instance, the eggs in the mine seem rather saggy and sad, but it's difficult to get to one to see for certain whether they're just aged or they actually hatched. Furthermore, there were and have been no trails to the mine from an external source to suggest a nest from which the present ants came.
I intend to find the ants from which I stole the egg and compare them to the present invaders, as this may help ascertain their origins. However, as the weather is currently dismal, I shall leave it until later.