Hemimetabola is a term used in entomology to describe insects that undergo incomplete metamorphosis. Some synonyms for hemimetabola include hemimetabolous, paurometabolous, and gradual metamorphosis. These insects have 3 life stages: egg, nymph, and adult. The nymph looks like a miniature version of the adult, with similar body proportions, but lacks wings and reproductive organs. Hemimetabolous insects are commonly found in the order Hemiptera, which includes true bugs, aphids, and cicadas. They also exist in the orders Orthoptera (grasshoppers and crickets), Thysanoptera (thrips), and some Coleoptera (beetles).