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

Psocid - Hyalopsocus striatus - male

Psocid - Hyalopsocus striatus - Male
Ithaca, Tompkins County, New York, USA
July 20, 2014

Thanks Diane!
Forgive the novice question, but how do you distinguish between male and female barklice?

Moved from Barklice, Booklice, and Parasitic Lice.

Here goes ...
In many families like Psocidae and Lachesillidae, the males are slimmer and have larger compound eyes. Even in Caeciliusidae, one can tell by the size of the cd. eyes. It's trickier in booklice, Psyllipsocidae and others. In many taxa the phallosome of the male can be seen without dissection. Hope this helps.

OK, thanks Diane!
I'll post this to the information page. Thanks for the help - I'll try to start sexing them from now on!

This is ...
Hyalopsocus striatus, male. It resembles Indiopsocus, but the phallosome is very prominent and different from Indiopsocus (you can see a small part of it in your image). A character of striatus is "cell Cu2 brown before nodulus".

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