When the last molt occurs, they are then considered pupae. The pupae will go through a metamorphosis and turn into the adult ants. Some types of ant pupae will actually form a cocoon with their saliva. The process takes about three months for them to mature from egg to adult. Metamorphosis is the scientific word for change.
Ants use several forms of communication.
Ants touch their antennae to communicate. They also use pheromones as communication. Pheromones are stinky chemicals excreted from glands throughout the ants body. These chemicals are received by other ants antennae. Pheromones are used to alert other ants of danger, mark trails, identify each other, enlist the help of other ants and scare off enemies.