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Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

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Order Pseudoscorpiones - Pseudoscorpions

Teeny Crablike Bug Pseudoscorpion 6.21.09 01b - female Garypus californicus? - Garypus californicus Pseudoscorpion Pseudoscorpion - Apochthonius Pseudoscorpion - Apochthonius Pseudoscorpiones ID request
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Pseudoscorpiones (Pseudoscorpions)
Other Common Names
false scorpions
Explanation of Names
"Pseudoscorpiones" is from the Latin word-element pseudo, derived from Greek pseudos (ψηυδος) "false" + Latin scorpiones, the nominative singular form of scorpio "scorpion".
Numbers
worldwide: ~3,530 spp. in >450 genera of 26 families(1)(2)
US: ~420 spp., 110 genera, 20 families(3); Canada: 26 spp., 20 genera, 7 families recorded; about as many others likely to occur(4)
Size
body usually <3 mm
Identification
small, flat, with pincer-like pedipalps (but no stinging "tail" as in true scorpions)
identification keys provided in(4)(2)
Range
worldwide
Habitat
under bark and stones, in leaf litter, caves, and homes(5)
Food
Most individuals have poison glands in their pincers which they use to subdue small insects.(6)
Remarks
They are not pests and are considered harmless
Even though most individuals have poison glands, the animals are not large enough to bite people(6)
Can run backwards with ease
Often hitchhike on beetles to disperse

I remember them being abundant in the chicken houses I was responsible for while growing up and I assume they must have been feeding on bird lice [Troy]
None are known to be parasitic but they feed on arthropods in bird and rodent nests. They are sometimes found on beetles or other large insects where they apparently feed on mites.(7)