The obvious answer would be a firefly. But that is the only bioluminescent insect I know. Sorry
By the mixing of two chemicals called 'bioluminescence'.
The light produced by bioluminescence uses the energy from a living organism. Bioluminescence occurs in marine animals, such as loose-jawed fish of the genus Tomopteris; bioluminescence also occurs in land animals, such as the glow worm and the firefly.
The molecule originally discovered to cause bioluminescence in fireflies was dubbed Luciferin.
bioluminescence is earths most important source of light tru or false
blue
bioluminescence
The female lightning bug uses her glowing tail to attract a mate.
Luciferin, and enzyme called luciferase. Bioluminescence does not occur in the absence of oxygen.
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.
Bioluminescence is a chemical energy that is released by some living organisms. Many fish that live in the deep ocean create this kind of light. Fireflies are another well-known example of bioluminescence.
"Bioluminescence is the biochemical emission of light by living organisms such as glow-worms and deep-sea fish..."
That would be the worm and the love bug, one of the most famous worm-like infections