Workers are monomorphic and are about 1/16 inches long. The body is usually pale yellowish to reddish with the abdomen often darker to blackish and unevenly rounded. They do have a stinger. Queens are about 1/8 inches long with or without wings and slightly darker in color than the workers.Pharaoh workers are about 1.5 to 2 millimeters long, a little more than 1/16-inch. 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. The petiole (narrow waist between the thorax and abdomen) has two nodes and the thorax has no spines. Pharaoh ant eyesight is poor. The antennal segments end in a distinct club with three progressively longer segments. Males are about 3mm long, black, winged (but do not fly). Queens are dark red and 3.6–5mm long. They initially have wings that are lost soon after mating, but do not fly.