psocid

psocid
—psocine /soh"suyn, sos"uyn/, adj.
/soh"sid, sos"id/, n.
1. any of numerous minute winged insects of the family Psocidae (order Psocoptera), including most of the common barklice, having mouth parts adapted for chewing and feeding on fungi, lichens, algae, decaying plant material, etc., and occurring on the bark of trees and the leaves of plants.
2. any member of the order Psocoptera, comprising the booklice and barklice.
[1890-95; < NL Psocidae, equiv. to Psoc(us) name of a genus ( < Gk psôchos dust) + -idae -ID2]

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▪ insect
      any of a group of about 5,000 species of soft-bodied insects, usually less than 5 mm (0.2 inch) long. Its slender antennae are at least as long as its body, and wing venation is simple, with no crossveins. Mouthparts are adapted for chewing, with the upper jaw usually elongated and chisel-like. Psocids eat fungi (including molds), cereals, pollen, and organic debris.

      The best-known species, the booklouse, is a pale, wingless insect usually found indoors among old books and papers, on dusty shelves, or in cereals.

      The majority of psocids, usually called barklice, generally have four membranous wings that are held rooflike over the body when at rest. They are found on tree bark and foliage, under stones, or in ground litter.

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Universalium. 2010.

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