Currently viewing the category: "Longhorn Beetles"
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Subject: What is this bug?
Location: Northern Maine woods
January 13, 2017 8:59 am
Hi , these bugs have just started randomly showing up in our newly built hunting/fishing home . It was stick built with knotty pine on the inside and spray foam insulation., and pine siding. We started building in may of 2015 and still have a painted plywood floor but other then that it is quite finished. It is located in Northearn Maine and we have not seen these bugs until this past November. Any help in identifying it would be extremely appreciated. Thank you
Signature: Pete

Cedar Tree Borer, we believe

Dear Pete,
Was any Cedar used in the construction of your new home?  This looks to us, based upon this BugGuide image, to be a Cedar Tree Borer,
Semanotus ligneus.  According to BugGuide: “hosts: Thuja, Cupressus, Juniperus.”  The appearance beginning in Novemnber may coincide with indoor heating being turned up higher.  If the beetle larvae or pupae were in milled lumber, they may have emerged with the increased heat.  They may also have been introduced in firewood.  If they were dormant in wood used in the construction of your home, you may continue to see them in subsequent years, but the good news is that they will not continue to breed in your home.

Well that does explain things. We did put up som cedar boards on a few interior walls.   So happy to hear that they won’t reproduce. Thank you for your reply.

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Subject: Los Cabo’s Mexico bug
Location: Los Cabos, Mexico
January 11, 2017 11:31 pm
Hi- we are visiting a Cabo resort on the water in January 2017. Returned to our hotel room to find a new companion on our wall. Quite beautiful and impressively large, the length of its body alone is about the diameter of a half dollar coin. Took the photo attached. It reminds of shield bugs we used to see in the midwestern US. We are assuming it is harmless and are allowing it to enjoy its spot on the wall. Are we correct to assume we have no reason to be concerned about its being nearby? We would love to know its proper identification. Thanks so much.
Signature: Pat and David RWC CA

Longicorn

Dear Pat and David,
This is a Longhorned Borer Beetle in the family Cerambycidae.  Members of this family are not considered dangerous, but they do have powerful mandibles and they might deliver a painful bite if carelessly handled.  We have a posting in our archives, also from Baja, that appears to be the same species, and we tentatively identified it as
Acanthoderes giesberti.  We will contact Arthur Evans, a beetle specialist, to see if he can provide a species identification.

Ed Note:  Arthur Evans referred our question to Steve Lingafelter who provided the following identification.  Here is the BugGuide page on the genus Lagocheirus.

Hi all,
This is Lagocheirus sp. (probably araneiformis ypsilon).
Cheers,
Steve

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Subject: Never seen before bug
Location: Frankston, Melbourne, Australia
January 8, 2017 6:27 am
Hi took this pic yesterday of strange looking bug
Signature: Vanessa

Feather-Horned Longicorn

Dear Vanessa,
We have several images in our archive of the Feather-Horned Longicorn,
Piesarthrius marginellus, from Australia

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Subject: What is this!?
Location: Buderim QLD 4556
November 30, 2016 6:00 pm
Hey there,
Found this little guy in my garage. Would say it would nearly be the size of my hand. Was HUGE!
His back looked like wood and he had six legs.
I live on the Sunshine Coast and it’s the first day of Summer here.
Thank you
Signature: Lilly

Prionid

Prionid

Dear Lilly,
This Root Borer in the subfamily Prioninae looks like
Agrianome spinicollis, and your submission is the third this year of this species.

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Subject: Big beetle id please
Location: Lake Macquarie NSW
December 12, 2016 8:52 pm
Hi, I’ve seen this beetle today for the first time, although my partner says he has seen it on the tree before. I have never seen one like it. It’s very big, about 60mm and appears to have been living on a sawn off palm trunk. I’m at Wyee Point, in the Lake Macquarie region of NSW. We have a lot of Eucalypts around.
Just wondering if it’s something that’s going to attack the timber in my home?
Thanks very much
Heather
Signature: Regards.

Prionid

Prionid

Dear Heather,
This Longicorn is a Prionid in the subfamily Prioninae, and just last month we identified a submission (and corrected a misidentified submission from our archive) as
Agrianome spinicollis.  Longicorns are members of the family Cerambycidae, and they are also known as Longhorned Borer Beetles because they have larvae that bore in wood, generally living or recently dead trees.  Milled lumber is generally safe from infestation, however, it appears that your deck is surrounding a standing trunk.  Beetles in this family are usually host specific, and not general feeders.  According to the Queensland Museum site:  “This species is found in rainforest and open forest in eastern Australia. It is common in Queensland and New South Wales and also occurs on Lord Howe Island. The larvae are huge white grubs found in rotten wood, especially dead Poinciana or fig trees. It is an important pest of pecan trees. The large adults sometimes blunder into house lights.”

Prionid

Prionid

Thank you,
we’ve relocated the beetle into the bush. The trunk (a palm) in the deck is not live, so I’m watching it for larvae. There are numerous holes in it, so it seems the beetle made a home there.
Have a nice Christmas and new year!

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Subject: Please identify this
Location: Argentina
December 9, 2016 9:57 am
Found it under a tree
Signature: Frosiano

Paromoeocerus barbicornis

Paromoeocerus barbicornis

Dear Frosiano,
This is a Longhorned Borer Beetle or Longicorn in the family Cerambycidae, and we actually very quickly identified it as
Paromoeocerus barbicornis thanks to the Eco Registros site.  There are also images on Meloidae (though that is the Blister Beetle family) and on BioLib.

Thanks! Spot on. You’ve been very helpful!

What's That Bug? does not endorse extermination