And as an additional note. You can also boost Pogonomyrmex rugosus with Pogonomyrmex californicus brood. In fact, boosting many Pogonomyrmex species actually helps A LOT in getting a colony started. Some might not get along entirely well though. I think boosting Pogonomyrmex californicus with Pogonomyrmex rugosus brood doesn't work (supposedly, Drew didn't seem entirely sure).
However, boosting Pogonomyrmex in general greatly raises success rate and boosts the colony's initial growth speed quite a bit. I'd almost say that is really the best way to get colonies going of the genus. While maybe not as satisfying as starting from just a single queen, I'd personally much rather have a higher chance of a successful colony. Especially because Pogonomyrmex in general can be rather hard to get a successful colony going.