The king and queen of the colony are brown ... live in decaying wood with various moisture content. Subterranean (underground) termites live in soil and wood that's connected to the soil.
The Florida Entomologist, Vol. 85, No. 4 (Dec., 2002), pp. 580-587 (8 pages) A statewide survey in Louisiana on the current distribution of the Formosan subterranean termite, Coptotermes formosanus ...