Toxorhynchites
Toxorhynchites, also called elephant mosquito or mosquito eater, is a genus of diurnal and often relatively colorful mosquitoes, found worldwide between about 35° north and 35° south. It includes the largest known species of mosquito, at up to in length and in wingspan. It is among the many kinds of mosquito that do not consume blood. The adults subsist on carbohydrate-rich materials, such as honeydew, or saps and juices from damaged plants, refuse, fruit, and nectar.
Wyeomyia smithii
Wyeomyia smithii, the pitcher plant mosquito, is an inquiline mosquito that completes its pre-adult life cycle in the phytotelma—that is, the water contained by the purple pitcher plant, "Sarracenia purpurea". In this microcommunity of bacteria, rotifers, protozoa, and midges, "W. smithii" is the top-level predator; its presence determines the bacterial species diversity within the pitcher. It is not in any way a pest mosquito, neither biting nor approaching humans or livestock, although there are some populations in the southern US, such as that in the Apalachicola National Forest, that have been observed to take blood meals after laying an initial egg batch. In fact, it is the only known mosquito to have both obligatory biting and non-biting populations in the same species.