Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Information, insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Barklouse - Psyllipsocus ramburii

Barklouse - Psyllipsocus ramburii
Richmond Hill, York Region, Ontario, Canada
July 20, 2017
Size: 2.8 mm
Found indoors.


Dear Stephen
may I have permission to use this image on my website?

Yes, feel free

Dr. Mockford weighs in..
I am so surprised to learn that this is the macropterous form of Psyllipsocus ramburii. You are the first to post this form of that species. It looks so different from the micropterous form. At least I had the genus right.

Interesting nonetheless...
Those are huge wings for an otherwise mostly micropterous species. Much thanks to you Diane and Dr. Mockford, for solving this mystery!

OK, I'm going to take a stab at it
while I wait for Dr. Mockford's opinion. I may get shot down, but I am going to guess this is an undescribed species of Psyllipsocus (Psyllipsocidae). It's not either of the species in his 1993 book (1) or any of the 12 species he described in 2011 (Trans. Am. Entomol. Soc. 137(1+2) 15-47.

If so, it's a real bummer that the critter got away. I found it on the second level high up on a window frame. But if its life history is similar to those described in the guide--here's hoping more are hanging out in the basement. So far on hands and knees, only Liposcelis with fat femora...

This is something special!
I'm sending it to Dr. Mockford immediately. Are there more of these critters around??

Fast flyer
Thanks for looking into this, Diane. I was clueless after perusing the guide pages! Unfortunately, it zipped off before I could take another shot. The house is a vast expanse for such a tiny critter. I've since been keeping an eye out for another.

I assume since you live so far north..
that you have a basement. Could there be more of these there??

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.