Flies, mosquitoes, midges, and punkies belong to which order of insects?

• A. Diptera
• B. Coleoptera
• C. Siphonaptera
• D. Hymenoptera

Answer: (A)

These insects are all true flies, which place them in the order Diptera. A key feature of Diptera is having only one pair of wings—the forewings—while the hind wings are reduced to small balancing organs called halteres. Flies, mosquitoes, midges, and punkies share this wing arrangement and undergo complete metamorphosis (egg, larva, pupa, adult). The other groups differ in their wing structures and body forms: beetles have hardened forewings called elytra, fleas are wingless, and bees/wasps/ants have two pairs of wings with a typical constricted waist. That combination of one pair of wings and halteres is what uniquely identifies them as Diptera.