Mansonia (Mansonioides) annulifera is a species of zoophilic mosquito belonging to the genus Mansonia. It shows a wide range of distribution from east to west. It is found in Australia, Bangladesh, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, New Guinea (Island); Papua New Guinea, Philippines, Sri Lanka, Thailand and Vietnam. It is an endophilic species, prefer to rest indoor places. Adults normally active in one after midnight and before dawn. It shows high affinity for human biting and is a potent vector of Brugia malayi to cause Malayan filariasis. In 1980, Japanese encephalitis virus was isolated from M. annulifera from India, which was the first isolation of the virus from this mosquito.