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

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of 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

Previous events

Staphylinidae 51 - Quedius alesi

Staphylinidae 51 - Quedius alesi
Oka, Deux-Montagnes County, Quebec, Canada
May 11, 1997
Size: 7mm


So, not erythrogaster after all...Thank you Curt. What makes you differentiate between the two on this picture?

Hi Robert, I just split Q.
Hi Robert,

I just split Q. erythrogaster into distinct eastern (Q. alesi) and western (Q. erythrogaster) species. They cannot be distinguished without dissection of males but their distributions do not overlap.

Paper here:

Moved from Rove Beetles.

Thanks! :-)

Moved from ID Request.

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