Thus, the repellant pheromone makes the pharaoh ant a particularly efficient forager. The pharaoh ant queen can lay hundreds of eggs in her lifetime. Pharaoh ant colonies appear to prefer familiar nests to novel nests while budding. However, all pharaoh ant colonies have the same hydrocarbons on their antennae. Pharaoh ant eyesight is poor and they possess on average 32 ommatidia. Pharaoh ant workers have a non-functional stinger used to generate pheromones. The pharaoh ant, "Monomorium pharaonis" is found around the world. In fact, the pharaoh ant relies on geometry to show it the way home. Pharaoh ant copulation, like that of many social insects, is harmful to the female.