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Photo above shows the adult parasitic wasp Thripobius semiluteus, which attacks only certain species of plant-feeding thrips. Photo below shows a typical distorted parasitized thrips larva (right), a black parasitoid pupa (center), and a normal thrips pupa (left). Immature stages of greenhouse thrips are pictured above. Upper left is small, first stage larva preferred by the parasite for egg deposition; at center is larger, second stage larva. Others are either prepupae, with antennae directed forward and short wing pads; or pupae, with antennae directed backwards and long wing pads.