These insects have only few large spines on tibae and do not have distinct rows of spines. The antennae arise below the eyes a nd not above as in leafhoppers. Few are abundant enough to be economic pests but many are spectacular looking insects. Generally minute insects rarely over 2-3 mm. Adults of both sexes winged and covered with white waxy powder .
First instar is active, selects a feeding spot and then settles.
Remaining immature stages remain on that spot until they become adults. Often they are covered by waxy scales that look like fish scales. The scale protects them and is composed of wax secreted by the insect. Whiteflies have a pupal stage unlike most Homoptera. They are one of most important groups of pest species in tropics because they occur in massive numbers and produce honeydew .