Adult : 6.4-12.7mm long, black with striped white markings (Aedes Spp.), thin, long-legged winged insect; adults have three pairs of long, slender legs, with an elongate "beak" or proboscis to pierce skin.

Eggs laid in stagnant water. Larvae develop in water and pupate after a week. Adults emerge from pupae after 2-3 days.

Only adult females bite humans and other animals as they need blood meals to produce eggs. They breed in stagnant water & Culex Spp. breeds prolifically in polluted water such as drains, cess pools, gutters, septic tanks, etc, in urban surroundings. It is the common house mosquito and a major nuisance after dusk, biting heavily and causing sleepless nights. It transmits Filaria.