Currently viewing the category: "Bark Beetles and Bark Gnawing Beetles"
What's That Bug? does not endorse extermination

Subject:  Red beetle
Geographic location of the bug:  Foothills of Western Cascades in Washington
Date: 04/26/2018
Time: 09:25 PM EDT
Your letter to the bugman:  Saw this on our deck… Can’t recall seeing a red beetle in our area before. What’s that bug?
How you want your letter signed:  Anonymous

Red Flat Bark Beetle

Dear Anonymous,
This is a Red Flat Bark Beetle,
Cucujus clavipes, and according to the Pennsylvania State University site:  “The flat bark beetle is found in forested habitats of northern North America (Alaska, Canada, and many northern and central U.S. states). … Adults are typically found under the bark in living or freshly cut trees although they might also be present in old logs and even in the leaf litter around fallen or cut trees. Tree species that seem to be preferred by the flat bark beetle include poplars, ashes, and oaks, but they are also found in a wide range of other species of trees. The adult flat bark beetles are active predators within their constricted, sub-bark micro-habitat.”

What's That Bug? does not endorse extermination

Subject:  Beetle with tree bark camoflauge
Geographic location of the bug:  Near Lake Burrendong in NSW Australia
Date: 03/29/2018
Time: 10:03 AM EDT
Your letter to the bugman:  Hello,
On the 28h of March, in the location specified, a beetle with an interesting camoflauge that looked rather like tree bark landed on my green t-shirt. I was curious as to what kind of beetle it was so I managed to take a few photos before it flew away. It stayed on my t-shirt without moving very much for quite a while, maybe 10-20 minutes before it flew away. I knew it was a beetle of some sort since it had wing covers, which I saw when it took flight. It also had six legs, which I observed while it walked across my t-shirt.
It would be great if this beetle could be identified, thanks.
How you want your letter signed:  A 16 year old, Alvin Yao

Bark Gnawing Beetle

Dear Alvin,
The best clue we have based on your image as we embark upon trying to provide you with an identification are the beaded or moniliform (see BugGuide) antennae.  We searched the Brisbane Insect site for Darkling Beetles, but found nothing similar.  We just took a guess at the family.  We will post your images as unidentified and continue to research your request.  Perhaps one of our readers will write in with an identification.

Bark Gnawing Beetle

Update:  Thanks to a comment from frequent contributor Karl, we agree that this is a Bark Gnawing Beetle which is depicted on Life Unseen.

What's That Bug? does not endorse extermination

Subject:  What is this beetle?
Geographic location of the bug:  League City, Texas
Date: 10/22/2017
Time: 12:24 AM EDT
These beetles have infested my towel closet in the bathroom (20-50 bugs).  I’ve fogged the room and it killed some, but they showed up again in 48 hours, primarily in the towels, but some are crawling along the floor.  They are tiny, about 1/5 the size of rice grain. What are these things?
How you want your letter signed:  CR and bugs

Bark Beetles or Cigarette Beetles???

Dear CR,
Based on the University of Minnesota Extension site, these look like Bark Beetles in the family Scolytidae, that are described as “small (1/8-¼ inch long), robust reddish brown to black insects. They are very common in the landscape, and can emerge from many types of wood brought into homes.”  Is your towel closet made of cedar?  Though there are many species of similar looking Bark Beetles, your individuals resemble the Cedar Bark Beetle pictured on BugGuide.

Update:  Cesar Crash of Insetologia has suggested these might be Cigarette Beetles, but BugGuide indicates they eat:  “Dry plant matter of any sort, including spices and tobacco.”  We wonder what might be their food in the towel closet.

What's That Bug? does not endorse extermination

Subject: Black Hairy Insect nesr White Pine Beetles
Location: California in Sequoia
March 19, 2017 6:43 am
Cannot identify the hairy black and white insect on this pine tree. The two pine beetles I could identify. This is taken at Wishon Camlground near Doyle Springs/Sequoia, in California.
Signature: Emily

Checkered Beetle and Red Turpentine Beetles

Dear Emily,
We believe your Pine Beetles are Red Turpentine Beetles,
Dendroctonus valens, a species pictured on BugGuide and found in California.  According to BugGuide:  “Primary host: Pinus.”  Your unidentified beetle is a Checkered Beetle in the family Cleridae.  A similar looking species is the Red Bellied Clerid Beetle, Enoclerus sphegeus, which is pictured on BugGuide.  According to BugGuide, the species if found in California.  Of the Checkered Beetle family, BugGuide notes:  “predaceous on other insects, larvae mostly on wood- and cone-borers; some adults feed on pollen; a few species are scavengers” so it is possible that the Checkered Beetle you found was preying on the adults and larvae of the Red Turpentine Beetles.

What's That Bug? does not endorse extermination

Subject: What is this beetle??
Location: San Diego
January 7, 2017 10:50 pm
Can you identify this bug/beetle
Signature: Thank you

Bark Gnawing Beetle

This appears to be a Bark Gnawing Beetle in the genus Temnoscheila and according to BugGuide:  “can inflict a painful bite if handled carelessly.”  Despite its name, Bark Gnawing Beetles are not injurious to trees, but rather they are predators.  Of the family Trogossitidae, BugGuide notes:  “Many are predatory on other beetles and their larvae.”  The Myrmecos Blog states:  “This colorful insect arrived to a blacklight in my backyard a couple of years back, right when I first moved to Tucson. Previously I’d encountered Temnoscheila only under the bark of dead trees, where they apparently prey on the larvae of other beetles. I’ve always wondered why a beetle that spends most of its time secluded in the dark would need such a brilliant metallic sheen, if the color serves a purpose or is just a spandrel.”

Ok I found 2 in my house…… so do you think it came In on some wood? We cut down and split our own…

That is a distinct possibility.  We read on iNaturalist that pine is a preferred host.

What's That Bug? does not endorse extermination

Subject: Bark-Gnawing Beetle?
Location: Delmar, MD
October 26, 2015 3:45 am
Could this be a Bark-Gnawing Beetle? Thanks…
Signature: G Robinson

Bark Gnawing Beetle

Bark Gnawing Beetle

Dear G,
You are absolutely correct that this is a Bark Gnawing Beetle in the genus
Temnoscheila as the images on BugGuide will verify.  BugGuide also notes:  “can inflict a painful bite if handled carelessly.” 

 

What's That Bug? does not endorse extermination