Pharaoh workers are about 1/16-inch, or 2.0 millimeters, in length. They are light yellow to reddish brown in color with a darker abdomen. Pharaoh ant workers have a non-functional stinger used to generate pheromones. Pharaoh ants can be found in hotels, large apartment buildings and groceries. Colonies are populous and usually established in inaccessible places in buildings. Pharaoh ants eat many household foods and also damage silk, rayon, rubber goods and insect collections. The Pharaoh ants breed continuously throughout the year usually in heated buildings and mating takes place in the nest. Mature colonies of this species contain several queens, workers, winged males, eggs, larvae, pre-pupae and pupae. The way Pharaoh Ants communicate is by using chemicals called (pheromones) they can alert other ants where food and also if danger is coming.