The London Underground mosquito is a species of mosquito in the genus Culex found in the London Underground. It is thought to have evolved from the overground species Culex pipiens recently. Biologists named the London Underground mosquito Culex pipiens molestus due to its voracious biting. Notably the London C.p. molestus assaulted Londoners sleeping in the Underground during the Blitz, although similar populations were already known. The name seems to already have been given to a species of mosquito found in Australia, named as long ago as 1775. The London Underground mosquito, although first discovered in the London Underground system, has been found in underground systems around the world. It is suggested that it may have adapted to human-made underground systems since the last century from local above-ground Culex pipiens, although more recent evidence suggests that it is a southern mosquito variety related to Culex pipiens that has adapted to the warm underground spaces of northern cities.