Insect Order Homoptera - cicadas, hoppers, whiteflies, aphids
The Homoptera are a large group of sucking insects.  There are more than 32,000 species and there is great diversity in body size.  All are plant feeders and have mouth parts adapted for sucking plant sap from trees and plants.  They can cause injury and destroy valuable food crops such as fruit trees and grain crops.  Some carry plant diseases, but a few provide secretion or other products that are beneficial and have commercial value.
     The mouth parts are adapted for sucking, the beak arises from the back of head, wings, when present, number four, the front wings have uniform structure, either membranous or slightly thickened; wings at rest usually held roof-like over body; male scale insects with only 1 pair of wings; ocelli present or absent; compound eyes usually well developed.  Most members of the Homoptera fall into one of two large groups: