Adults have vestigial mouthparts. True bugs True bugs have sucking mouthparts that form a beak projecting from the front of the head. The structure of the front wings is also a distinctive feature, the basal portion of the front wing is thickened and leathery and the apical portion is membranous. This type of wing is called a hemelytron. The hind wings are membranous and slightly shorter than the front wings.
Some species are wingless.
The antennae are long and straight. Aphids, cicadas, leafhoppers and scale insects Homoptera have sucking mouthparts that form a beak that arises from the back of the underside of the head, near the front legs. Winged Homoptera have four wings, with the front pair either membranous or slightly thickened. The wings are held rooflike over the body. There are many wingless species of Homoptera and in some species both winged and wingless individuals occur.