Insect Order Thysanoptera - the thrips
They are described as holometabolous (having a complete metamorphosis even though the nymphs look like small wingless adults) insects with 2 or 3 inactive pupa-like instars. Thrips are the only members of the 'Exopterygote' (insects whose wings develop outside there body and thus have externally visible wing buds in the late nymphal and pupal stages, in comparison with the 'Endopterygote' insects whose wings develop inside their bodies and are thus not visible until after metamorphosis) to have developed a true pupal stage. They have asymetrical mouthparts, having only one (the left) mandible, short 6- to 10-segmented antennae and no cerci. Their wings when present are nearly equal, very thin with little venation and a lot of hairs making a fringe around the edge, these hairs greatly increase the effective size of the wings. Fully winged, brachypterous (with reduced wings) and apterous (wingless) forms may occurr in the same species, the wingless forms tend to be more common towards Autumn. They have piercing sucking mouthparts.