Mosquito
Mosquitoes of the genus "Toxorhynchites" never drink blood. This genus includes the largest extant mosquitoes, the larvae of which prey on the larvae of other mosquitoes. These mosquito eaters have been used in the past as mosquito control agents, with varying success.
List of largest insects
The largest of the bee species, also in the order Hymenoptera, is "Megachile pluto", the females of which can be long, with a 6.3-cm (2.5-in) wingspan.