Identifying character These insects have a single pair of wings (hence the name "Di-pthera"). 2. The modified hindwings are reduced to a pair of balancing organs called.seem to function as stabilizers or as airspeed detectors. 3. The shape of the antennae varies,filiform, stylate,or aristate 4. The mouthparts are adapted for sn piereing-suckin or spongine.In some species, they are atroph. 5. Tarsi 5-segmentedIdentifying character 1. These insects have a single pair of wings (hence the name "Di-pthera"). 2. The modified hindwings are reduced to a pair of balancing organs called halteres. seem to function as stabilizers or as airspeed detectors. 3. The shape of the antennae varies, filiform, stylate, or aristate 4. The mouthparts are adapted for sucking, piercing-sucking or sponging. In some species, they are atrophied. 5. Tarsi 5-segmented