Which insect uses bioluminescence for mating?

Click beetles and fireflies are both bio luminescent. Click beetles are equipped with two menacing "false eye-spots" on the thorax, and many are more than 1-1/2 inches in length. Tropical relatives of the big-eyed click beetle are called fire beetles and have bioluminescent eye-spots. One, Pyrophorus luminosa, produces "cold light" that is green and red, and is as bright as that of the more familiar fireflies. Its larvae, called glow-worms, also produce light.