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

Darkling Beetle2602 - Eleodes acuticauda

Darkling Beetle2602 - Eleodes acuticauda
Escondido, San Diego County, California, USA
October 12, 2005
Size: About 40mm
Eleodes perhaps?

Images of this individual: tag all
Darkling Beetle2602 - Eleodes acuticauda Darkling Beetle2602 - Eleodes acuticauda


Eleodes, likely armata
Arnett and Jacques, Guide to Insects #146 (1) has a photo of Eleodes armata, say this is a difficult genus, but "this is one of the few species that can be easily recognized by the shape and the presence of femoral spines." They call it Desert Skunk Beetle, give size as 15-35 mm, and say it is common. Powell and Hogue, p. 296, fig. 393 (2), call it Armored Stink Beetle (17-33 mm), and say it has prominent spurs on all legs, widespread in California: coastal southern California, deserts, Central Valley. They mention the Dentate Stink Beetle, E. dentipes (16-28 mm, San Luis Obispo County northward), has teeth just on the front legs, as do some others in the genus.

This page has very detailed photos of E. armata.

So genus Eleodes seems to be correct, species armata (or a similar one?) likely. Perhaps Eric Eaton or another western beetle expert will chime in.

Patrick Coin
Durham, North Carolina

Yes, I agree.
The tooth on the front femur ("bicep") is pretty distinctive for E. armata, but might also apply to related species. I'm in no way a western beetle expert, but the genus is definitely correct.

not armata
Many species of Eleodes have the tooth on the profemur. Armata has tooths on all the femurs, which this does not seem to have. The profemoral tooth and the pronotum which is pinched at the base likely puts it in the Denticolle species group.

Denticolle species group?
I poked around the interent for references to "Denticolle" with respect to this group and found nothing. Or is "Denticolle" a sort of synonym for dentipes?

I was reviewing my past submissions and realized I'd missed your comments. My appologies and thanks for the help.

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