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Order Psocoptera
Psocoptera
are Hemimetabolous with thread like antennae of 12 to 50 segments, the compound
eyes of many species look like hemisheres that have been stuck on the outside
of the head, though in a few species of Liposcelidae they are greatly reduced.
Some are winged, with delicate membraneous wings and some are not, the winged
species possess 3 ocelli while the apterous (wingless) species have none.
They have biting mouthparts, no cerci and date from the Permian times. Psocids
have been recorded coming to light traps by some researchers.
Information provided by: http://www.arthropod.net