Currently viewing the category: "Longhorn Beetles"
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Subject: 50 of the came out of nowhere
Location: Delaware Ohio 43015
April 19, 2017 6:40 pm
We have lived here for 17 years and have never witnessed this before. One late afternoon mid April in Central Ohio our detached garage started to buzz. There were at least 50 of these mating. What are they and are they dangerous. We have small children and pets. Very concerned. Thank you,
Signature: Thank you Ryan Boyer

Mating Hickory Borers

Dear Ryan,
Was there a pile of firewood in or near your garage?  Because of their spring appearance, we know these are Hickory Borers and not the very similar looking and closely related Locust Borers that usually appear in the fall when the goldenrod is blooming.  Neither species is dangerous, but both mimic stinging YellowJackets for protection.  While not dangerous, Hickory Borers have strong mandibles that might deliver a painful nip if carelessly handled.  Larvae of Hickory Borers are wood borers, and according to BugGuide:  “larvae mine newly dead hickory, and sometimes other hardwoods.”

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Subject: Thai longicorn
Location: North of the Gulf of Thailand
April 9, 2017 8:40 pm
Hi, I found this longicorn at night at the start of the hot season (March) in central Thailand, right before two weeks of heavy rain showers.
It was about 8cm in length and I was able to pick it up, it did not hiss or squirm but may possibly have been dazed by a light.
The area where I found it is a small open grassy area, at the side of a reservoir and wetland, surrounded by protected tropical forest, not far from Chonburi on the coast of the Gulf of Thailand.
A week before finding this specimen, I saw the same species mating on a wall, and another drowned in a small puddle of water. Since March I have not seen any so possibly they were active to mate?
It would be awesome if I could get an ID!
Signature: Laura


Dear Laura,
Your Longicorn is a Prionid in the subfamily Prioninae.  Prioninae of the World has a page devoted to species found in Thailand, but not all species are pictured.  Of the ones pictured on Prioninae of the World, in our opinion, the one that most resembles your individual is
Spinimegopis lividipennis because both have several prominent spines on the thorax.  The species is also pictured on Cerambycoidea Forum.

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Subject: Beetle ID
Location: Vancouver BC Canada
April 5, 2017 7:48 pm
Friend has a chore of planks of found wood that she is going to use as a bar top. She has heard gnoshing /scratching inside the plank. There are 3 holes in the plank. After 2 months the beetle pictured crawled out.
Signature: Tyler

Spruce Zebra Beetle, we presume

Dear Tyler,
Do you know if the wood was local and do you know the type of wood?  This is a Longhorned Borer Beetle or Longicorn in the family Cerambycidae.  We are quite certain it is in the tribe Clytini, and there are several similar looking genera on BugGuide, but our top choice for your species is the Spruce Zebra Beetle,
Xylotrechus undulatus.  The species is described on BugGuide as being “adult body length about 12 mm” and “Adult: black to dark brown or gray with white or pale yellow markings on elytra; antennae slightly shorter than elytra; anterior of pronotum with incomplete white or yellow collar (broken in dorsal midline); two pale transverse bands divide each elytron into three approximately equal portions, with the basal portion having a pale central patch; elytra may have whitish or pale gray shading, and posterior lateral corner of pronotum may be pale yellow.”  BugGuide also notes:  “larvae feed under the bark of spruce (Picea spp.) and other conifers” so if the wood was pine or spruce or some other coniferous tree, that would lend credibility to the species identification.  Other possibilities include Xylotrechus longitarsis which is “probably synonymous with X. undulatus” according to BugGuide and the Banded Ash Borer, Neoclytus caprea, which according to BugGuide is found as far north as Idaho, meaning the wood might not have been local.  Additionally, BugGuide notes the species feeds on hardwoods including “sapwood of ash, sometimes oak, hickory” and that “often emerges indoors from firewood; sawlogs may become infested within 20 days of felling during summer.”  Our money is still on the Spruce Zebra Beetle.

Thankyou, I think you have got it. The wood is Spruce.

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Subject: Bug Identifier
Location: Richmond,KY
April 1, 2017 2:23 pm
Don’t think this is anything to worry about, but we’d like to know what it is.
Signature: John

Hickory Borer

Dear John,
Because of its April appearance, we know that this is a Hickory Borer,
Megacyllene caryae, because its similar looking, close relative the Locust Borer, Megacyllene robinae, is generally sighted during the autumn months.  According to BugGuide:  “larvae mine newly dead hickory, and sometimes other hardwoods.”  Both species are harmless to humans, though they have strong mandibles that might produce a painful pinch.  It is widely believed that both species benefit from mimicking stinging wasps.

What's That Bug? does not endorse extermination

Subject: Beetle Id?
Location: Osa de Costa Rica
March 30, 2017 8:00 am
Collected this beetle in Bahia Ballena, Costa Rica. I do believe that it’s a wood borer ( Cerambycidae )
Can you tell me more?
Signature: charles limmer

Longicorn: Callipogon lemoinei

Dear Charles,
This is indeed a Longicorn in the family Cerambycidae.  We attempted to search the name written on the piece of paper,
Callipogon lemoinei, and we agree with your identification based on images posted to The New World Cerambycidae Catalog.

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Subject: Ginormous 6 legged creature found on beach
Location: Puerto vayarta mexico
March 22, 2017 7:39 pm
We found this dead bug on the beach in Mexico . It’s distinguishing features are
– 6 legs front 2 very long…approx 3.5inches
– pinchers
– super long antennae
– black and yellowish
– upon closer inspection looked like it could fly
– very hard shell
– underneath looked like a cockroach
– body was approximately 2inches
We asked many locals nobody could identify. We are so curious. I researched waterbeetles but nothing had the huge front legs.
Thank you for your help and we look forward to learning what it is!
Signature: Kate

Male Harlequin Beetle

Dear Kate,
This magnificent male Harlequin Beetle,
Acrocinus longimanus, is in the Longicorn family Cerambycidae.  It can fly.

Male Harlequin Beetle

What's That Bug? does not endorse extermination