Formicosa Palace is a bladder in the Formicosa bladder complex, and is a part of the Tricularia system as a whole. It is off limits only to the ants and is where Queen Beloka and Queen Orrha, the two queens of the ants, live. The palace is also where the ants have their nurseries there. As Gregorsa puts it in his note, "Like the lowest levels of ant nests in your world..." stating the fact that they are at the lowest point in the Formicosa part of the Tricularia system, while also referring to ants in our world using the lowest levels of nests to hold things like the nurseries and the queen.