Aleurothrixus floccosus

Passos de Carvalho (1994) provides many photographs of A. floccosus in Madeira.
Eggs
Eggs are very small, less than 0.2 mm in length. Usually eggs are laid in circles or semicircles. In this manner it is easier to detect the egg stages which are usually also accompanied by an area of waxy dust.
Nymphs
A. floccosus goes through four nymphal instars, the last of which becomes the pupal stage. The nymphal stages are very similar to each other and differ mainly in size. Nymphs secrete a woolly covering of rather dirty-looking, flocculent white wax. Under the wax covering, the nymphs may be pale yellow or, in some populations, brown (see comments under Taxonomy and Nomenclature).
Pupae
The puparium is the most important stage for identification. It is elongate in form, usually of a light-cream colour, but very rarely black individuals can also be found. The length varies from 0.8 to 0.92 mm and the width is 0.55-0.65 mm. Patti and Rapisarda (1981) described the pupa of A. floccosus in detail.
Adults
As with most whitefly species, adults are not used for identification, only pupal cases being used for such a purpose. Adult whiteflies are usually white, always winged, with waxy secretions on their bodies, offering few diagnostic features for identification purposes. Passos de Carvalho (1994) provides photographs of adult morphology.