The Subterranean termite swarmer is about 3/8" long including wings. The body is dark brown to black in color.
The Subterranean termite soldier is about 3/8" long with mandibles, the mandibles lack teeth.
The Subterranean termite swarms during daylight and occurs during springtime. Colonies are located underground, usually below the frost line and above the water table and rock formations. The Subterranean termite builds mud tubes to travel through areas of adverse conditions and will run from the colony and the food source.
Soil treatment with long residual insecticides to provide a chemical barrier is the most commonly used control or prevention method for subterranean termites.