The most widespread group of termites. They cause most of the termite damage to structural timbers in the United States. Nests are usually in the soil. Winged forms are on 1/2" long. Workers and soldiers are about 1/4" long. The soldier has an elongated, quadrangular, light yellow head with straight mandibles, curved at the tip. The thorax of the worker is narrower than the head and abdomen.