The first instars are called "crawlers".[2] They are less than 0.5 millimetres (0.020 in) long, salmon-colored, and wingless with well-developed legs.[2] As adults, they demonstrate significant sexual dimorphism. Males are gnat-like with fragile wings, while females are bulbous with reduced legs and antennas, and are easily mistaken for buds or galls.[2]
