There are three stages of subterranean termites, reproductive, workers, and soldiers.
The reproductive termites, also known as swarmer or flying termites, are dark colored with wings and are seen swarming in the air, on windowsills, or by doors. Sometimes the wings detached.
Workers constitute the majority of the colony. In this stage, they damage wood or cellulose material. They are whitish with thin antennae, soft bodied, and about ¼ of an inch in length.
The soldiers defend or protect the colony from intruders. They are whitish with a brown mandible or jaw. Workers and soldiers hide in mud tubes or in the nest and you mainly see them when you disturb the nest or tubes.