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Eleodes obscurus (Tenebrionidae) in Colorado Springs - Eleodes obscura - female

Eleodes obscurus (Tenebrionidae) in Colorado Springs - Eleodes obscura - Female
Colorado Springs, Palmer Park, elevation 6500 ft, El Paso County, Colorado, USA
August 6, 2006
Size: L = 27 mm
All Eleodes have no wings, therefore are flightless, and must run well.

Moved from Eleodes.

E. obscurus. the large size and striated elytra makes this E. obscurus. This species exhibits great morphological diversity and the most recent treatment of the group (Blaisdell early 1900s) divides it into many distinct variations.

Yours IS an Eleodes.
Adalbert, your image IS a species of Eleodes, maybe E. obscura (spelling?). I don't know if it has not achieved full pigmentation, or if the maroon is part of its usual coloration.

Stink Beetle / Acrobat Beetle
Looks a lot like the beetle that I posted here: (scroll down to see the photo and complete post.) My beetle was located in Sedona, AZ.

This was the response from "What's That Bug." -- This is a member of the Family of Darkling Beetles, Tenebrionidae, genus Eleodes which are known as Stink Beetles. According to Hogue they are "smooth shiny black beetles. ... They are medium to large (1 to 1 1/4 in.) and their wing covers are fused along the midline making it impossible for them to fly. These conspicuous beetles are usually encountered as they amble along the ground. Individuals may also be found under stones and loose tree bark, where the long cylindrical larvae also live. ... When a Stink Beetle is disturbed or its wandering is interrupted, it stand on its head and points it rear end into the air. For this headstanding habit, these insects are sometimes called 'Acrobat Beetles.' Adults may emit a disagreeable though weak odor when handled."

Not Eleodes
The beetle on your mentioned website is not Eleodes, nor a Tenebrionid. Check Essig: Insects of Western North America,1956, p. 376 which shows Calosoma semilaeve which is also listed as a species in the CU Museum (Boulder,Colorado).

It is an Eleodes.
The website citation of Eleodes given by Su Rogers is also correct. While I still have a treasured copy of Essig (and autographed by Essig), I wouldn't spend much time using it for my beetle identifications.

Thanks, Eric and Donald.

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