Currently viewing the category: "Longhorn Beetles"
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Subject: new bug
Location: Bend Oregon
February 21, 2015 11:47 pm
this is a new bug all over my house we were on vacations to Thailand for 2 weeks and the day I got back I notice this bug all over the house, is not in the rooms just in the kitchen and the living room! but in the last two hours I saw 5 of them… please help me
Signature: Marian


Cedar Tree Borer

Hi Marian,
We are requesting assistance from Eric Eaton to help identify your beetle.

Hi Eric,
It looks a bit like a checkered beetle, but the person from Bend Oregon who sent the picture has indicated that significant numbers are appearing inside the home, which makes me wonder if it is a wood borer.

Eric Eaton provides identification:  Cedar Borer
It is indeed a longhorned woodborer, the Cedar Tree Borer, Semanotus ligneus.  Here’s the Bugguide link:
Yes, they are likely emerging from firewood, but potentially from the structure itself, or cedar furniture.  For reasons still unclear, when a beetle larva is trapped inside milled lumber, it frequently extends the life cycle of the larva by years, sometimes decades.  Then, suddenly, beetles are popping out of whatever the lumber was used to build.
Eric Eaton

Hi Again Marian,
Eric Eaton has identified your Cedar Tree Borer, and Bugguide indicates it feeds on “Juniper, Cedar”
in the larval stage.  Since you found significant numbers in the home, we are speculating that wood that was infested with larvae resulted in a mass eclosion or emergence.  Perhaps there was some firewood in the home, or perhaps you bought a recent piece of cedar or juniper furniture made with infested wood.

Daniel and Eric thank you so much! yes there was so firewood (juniper) inside.
Thank you again !

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Subject: Unknown Insect
Location: South Africa, Cape Town
February 20, 2015 1:13 am
Found this interesting insect in my moms garden in Cape Town, Western Cape, South Africa.
It looks similar to a grasshopper but have no idea what it is. Have never seen this before. Hope you can help identify it.
Signature: JC Hanekom

Cape Longhorn

Cape Longhorn

Dear JC Hanekom,
This looks to us like a Cape Longhorn,
Ceroplesis capensis, which is pictured on iSpot, but for some reason, your individual is missing its distinctive long antennae.

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Subject: Is this a fan horn?
Location: Kununurra Wa
February 14, 2015 2:30 pm
So we found this fella in the washing up pile. We live in the kimberley region of WA and no one we knew had seen this before, can you please tell us some more!
Signature: Ben

Featherhorned Longicorn

Featherhorned Longicorn

Dear Ben,
We are relatively certain your beetle is a Featherhorned Longicorn,
Piesarthrius marginellus, which is relatively well represented on our site compared with the rest of the internet.  Your Western Australia sighting is beyond the sighting range reported on The Atlas of Living Australia.

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Subject: request indentification of grashopper like insect
Location: south part of iSimangaliso Wetland Park, South Africa
February 2, 2015 3:51 am
If I am not confused with another instance, I believe It was this insect (I saw flying before it rested on the bark of a tree), thought it was some sort of butterfly when it flew, but then looked a bit like a grasshopper when it rested on the bark of this tree.
Signature: Bram de Haan, Bilthoven, the Netherlands



Dear Bram,
This is a Longicorn, a beetle in the family Cerambycidae.  The larvae are borers and they are also known as Longhorned Borer Beetles.  Your individual looks very much like the North American Bumelia Borer, but your email indicates that you took the image in South Africa after watching it fly.  You did not indicate that you downloaded a similar looking insect from the internet, so we assume that you actually took the image.  We believe we have correctly identified your Longicorn as
 Philematium virens based on this image posted to iSpot.

Thanks a bunch for this, updated my blogpost (in Dutch) on the wetlands by St. Lucia (part of my recent South Africa trip) with your identification.
​kind regards,
Bram de Haan
Bilthoven​, the Netherlands​

Your blog looks great Bram.

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Subject: Giant African Beetle
Location: Ghana Africa
January 20, 2015 7:10 pm
This beauty visited us at breakfast one morning in Ghana Africa. Looks a bit like a blister beetle, is that correct? I never got blisters, but I was really gentle with it.
Signature: Don


Longicorn may be Analeptes trifasciata

Dear Don,
This is a Longicorn in the family Cerambycidae.  We have tried to identify the species without any luck, but we have not finished searching.

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Subject: Spotted Tree Borer ?
Location: Calgary, Alberta, Canada
January 5, 2015 9:06 am
Hi there,
One of our commercial office tenants imported a table from British Columbia, and found themselves with a little infestation (not initially connected with the table itself). We confirmed sawdust and holes underneath the table and found 4-5 of these little buggers.
A local authority came out and told us they might be Asian Long Horn beetles (which were apparently eradicated as an invasive species in Canada in 2007) and took some away, but my advanced Google skills say it might be a Spotted Tree Borer, native to BC. Can you confirm? If it helps, the table was from a Japanese plum tree, although I can’t confirm if it was grown in BC or imported.
Thanks !
Signature: – Kevin B. Hall



Dear Kevin,
This is a Longicorn or Longhorned Borer in the family Cerambycidae, but we are not certain of the species.  We are posting your image and we hope one of our readers can provide an identification while we are away from the office for a spell.
  It is NOT the Asian Longhorn.  Can you please provide us with a scientific name for the Spotted Tree Borer?

Hi Daniel,
I’m not a bug guy but the reference I find repeated on the internet is Synaphaeta guexi.
The Canadian Food Inspection Agency actually took our critters and send them to Ottawa for identification. They called my operator back but I think they just confirmed it was not the Asian Long Horn and was not considered invasive, without telling us what it actually was.
Thanks for the response !
Kevin B. Hall

Hi David,
A beetle expert named Mardikavana indeed identified your Longhorn as
Synaphaeta guexi.  We apologize for the delay, but we were away from the office for a week.

Update:  January 17, 2015
Thanks to a comment from Mardikavava, we believe this is
Synaphaeta quexiSee BugGuide.

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