Currently viewing the category: "Bark Beetles and Bark Gnawing Beetles"
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Subject: Cucujus clavipes
Location: Wellington, Colorado
September 22, 2012 10:48 pm
I decided to do some bug searching with one of my three sons today and it ended being all four of us. We have an old cottonwood stump that I cut down and we decided to pull away some of the bark to see what was going on. Upon pulling it off and getting past the centipedes, we saw two very unique beetles. One I was able to identify using bug guide!
http://bugguide.net/node/view/494540
So I’m submitting my pictures as I haven’t seen them on What’s that bug for a while.
Signature: Fish Seal

Flat Red Bark Beetles

Dear Fish Seal,
Thanks for submitting your images of Red Flat Bark Beetles,
Cucujus clavipes.  We have not posted a new image of the species since 2010.  The Florida State Collection of Arthropods has some additional information on the family.  It seems like your images were reduced in size and resolution.  We can easily accept images with a higher resolution in order to provide the highest quality for our readership.

Flat Red Bark Beetle

Daniel,
I’m sorry about how the pictures came through.  I have attached the full pictures.

Thanks.  We are making a swap, but that takes additional time.  Please submit full size files in the future.

 

What's That Bug? does not endorse extermination

Emerald ash borer?
Location: Annapolis, Maryland
December 19, 2011 8:54 am
Hi, I found this insect while chopping wood. At first I was concerned that it was an emerald ash borer as it is the right size (14mm long) and shape. It’s head, especially the eyes and mandibles look quite different though.
It was dead when I found it, seemed to be attached to the wood by its rear end.
Thanks!
Signature: ash borer?

Bark Gnawing Beetle: Temnoscheila species

Dear ash borer?,
You are correct that this is not an Emerald Ash Borer, Agrilus planipennis, which is nicely represented in this excellent online pdf prepared by Gary L. Parsons of the Michigan State University Department of Entomology.  On page 55 of that pdf, we located a Bark Gnawing Beetle,
Temnoscheila virescens that appears to match your beetle.  It is described as:  “Length: 8.6-17.8 mm, slightly larger than EAB.  Color bright green or blue-green varying to almost dark purplish-blue, often with brassy reflections.  Head large, prognathous, and more evident than in Buprestidae, and the connection of the pronotum to mesothorax is narrowed, waist-like.  T. virescens occurs in the eastern U.S. with T. chlorodia (Mannerhiem), a very similar species, occurring in the western North America. Both species are predators found under the bark of dead trees where they feed on a variety of woodboring beetles.”  That Bark Gnawing Beetle can also be found on BugGuidealong with several other members of the genus.

Bark Gnawing Beetle

On the genus page, BugGuideindicates:  “can inflict a painful bite if handled carelessly.”  Thanks for providing our archives with this convincing Emerald Ash Borer imposter.

Bark Gnawing Beetle

 

What's That Bug? does not endorse extermination

Argentine Ants were swarming the wisteria.

Ikebana with Black Walnut, Wisteria and Fuschia

What caused this branch to turn yellow?  Might this endangered California Black Walnut Tree have 1000 Cankers Disease?

Ikebana with Black Walnut, Wisteria and Fuschia

This Ikebana looks much prettier with natural light.  We spent quite some time today indulging ourselves and working in the garden.

What's That Bug? does not endorse extermination

What’s This Bug?
Location: NE Ohio
November 4, 2010 6:15 pm
My friend found this in his home and I tried to identify it for him, but nothing similar is in my insect guide. Any idea?
Signature: Thanks, Derek

Flat Red Bark Beetle

Hi Derek,
It is a flat, red beetle and it has the common name Flat Red Bark Beetle,
Cucujus clavipes, because, according to BugGuide, it is:  “Found under the bark of ash and poplar, especially recently felled trees” where it is “presumably predaceous on other arthropods.

What's That Bug? does not endorse extermination

Look at what my cats found
July 13, 2010
They were getting along so I knew something was up. They found this running accross the carpet in my bedroom. First time I’ve seen more than a fly inside the house. The weather outside has been really hot the last couple of days, is that related?
Thanks, Devan
Colorado Foothills (suburbia)

Red Flat Bark Beetle

Hi Devan,
Your photo is blurry which often makes identifications difficult, but we are relatively certain that this is a Pole Borer,
Neandra brunnea, one of the Long Horned Borer Beetles in the family Cerambycidae.  According to BugGuide:  “Larvae bore in trees, as well as structural wood (such as poles, crossties) in contact with moist ground. Adults frequently come to lights, though sometimes adults emerge, mate, and lay eggs in the same cavity they occupied as a larva“.

Correction courtesy of Eric Eaton
Daniel:
It is Cucujus clavipes.
Eric

Thanks Eric,
According to BugGuide, the Red Flat Bark Beetle,
Cucujus clavipes, is “Found under the bark of ash and poplar, especially recently felled trees” and is “presumably predaceous on other arthropods.

Hi Daniel,
Sorry about the camera but I can say that the pictures on that link look exactly like what I have in front of me.  You rock!
Thanks,
Devan

What's That Bug? does not endorse extermination

What’s this bug?
June 2, 2010
This bug was about an inch long and metallic blue, with purple, depending on how you looked at it. I can’t find what it is. Picture attached. Thanks!
Elizabeth
OK

Bark Gnawing Beetle

Hi Elizabeth,
We believe this is a Bark Gnawing Beetle in the genus Temnoscheila.  Surprisingly, we came to that conclusion very quickly while browsing BugGuide.  Despite the name, BugGuide also indicates that they are predators and states:  “Larger species can inflict a painful bite if handled carelessly.

What's That Bug? does not endorse extermination