What's That Bug? does not endorse extermination

Subject: Tiny with large pinchers/antannae
Location: Rhinelander, WI
December 30, 2012 10:24 pm
I found this on the wall in a cabin in northern Wisconsin. I was struck by the large pincer/antannae-like things in front. It was about 1-2mm minus the long things. Does anyone have any idea what it is? I don’t know much about bugs, but no one in my family had ever seen anything quite like it before. Thanks!
Signature: KO

Pseudoscorpion

Dear KO,
This is a harmless Pseudoscorpion
  Pseudoscorpions are not considered Household Pests.  They are generally outdoor creatures, but since they are so small, they are rarely noticed outside.  Only when they enter homes do they become more visible.  They can survive indoors where they feed on a variety of unwanted Household Pests like cockroaches and other undesirable intruders, so they can be considered beneficial.  Unlike their namesakes, Pseudoscorpions do not possess venom and they pose no threat to humans, pets or household furnishings.

Thanks for taking the time to reply! Happy New Year!

What's That Bug? does not endorse extermination
Location: Wisconsin
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4 Responses to Pseudoscorpion

  1. Tenodera says:

    Pseudoscorpions actually do secrete venom from the pedipalps, although it is completely harmless to humans and so not very important to KO.

  2. Tenodera says:

    Here’s one. http://seagrant.uaf.edu/marine-ed/curriculum/images/stories/kindergarten/pseudoscorpion.pdf

    The venom is relatively weak and can usually only bring down prey the pseudoscorpion’s size or smaller. Some pseudoscorpions have a degree of social behavior because they can team up to subdue larger insects.

    • bugman says:

      Thanks so much for providing this information. We will be sure to use this in future responses while trying to alleviate the fears of folks who encounter harmless Pseudoscorpions.

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