Be sure to roll the appropriate knowledge skill for identifying the ant creatures before you make a post otherwise your metagaming.
SRD:
In many cases, you can use this skill to identify monsters and their special powers or vulnerabilities. In general, the DC of such a check equals 10 + the monster’s HD. A successful check allows you to remember a bit of useful information about that monster.
They are outsiders, so that would require Knowledge: The Planes (DC 11) to identify them as Formian Workers, higher difficulty to discern what class they are up from worker.....Warrior Taskmaster, Myrmarch or Queen
Thanks
DM