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For Insects, Spiders & Their Kin
For the United States & Canada
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Family Lachesillidae - Fateful Barklice

Fateful Barklouse - Lachesilla penta - male Idaho Psocid - Lachesilla nubilis Psocid at night light - Lachesilla Lachesilla kathrynae - female Small winter barklouse - Lachesilla female? - Lachesilla Lachesilla? - Lachesilla Psocodea - Lachesilla Lachesilla? - Lachesilla - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Psocodea (Barklice, Booklice, and Parasitic Lice)
Suborder Psocomorpha
Infraorder Homilopsocidea
Family Lachesillidae (Fateful Barklice)
Explanation of Names
Lachesillidae Pearman 1936
43 spp. in 4 genera in our area(1); ~650 spp. in 26 genera total (of which ~350 spp. in Lachesilla)(2)
Very small barklice with clear wings and a distinct cubital loop (U-shaped vein in the central upper margin of the forewing). Ectopsocidae look very similar but lack the cubital loop. (Philip Careless, 12/24/2007)