Currently viewing the category: "Longhorn Beetles"
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Subject: Giant grub
Location: Foster, Rhode Island
May 17, 2015 8:45 am
I found a two-inch grub digging out an old oak stump in early April, incubated in a jar on the counter for a few weeks (where it grew an impressive two inches) and put it back outside a few days ago. Any clues as to what it might be? I thought about keeping it inside until it hatched but I wasn’t sure I could keep the conditions correct and didn’t want to kill it.
Signature: Earthworm

Root Borer Grub

Root Borer Grub

Dear Earthworm,
This is the grub of a Root Borer in the subfamily Prioninae, but alas we are unable to provide a genus or species.  See this BugGuide posting for a similar image.

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Subject: coleopter ?
Location: Brazil Bahia
May 6, 2015 1:09 pm
Huge bug, at least 10cm long
Signature: ecotrancoso

Prionid

Prionid

Dear ecotrancoso,
You are correct that this is a beetle, and it is in the family Cerambycidae, the Longhorned Borer Beetles.  We are also quite confident that it is in the subfamily Prioninae, and according to BugGuide:  “world’s largest beetles are members of this subfamily.”

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Subject: Wasp beetle in California?
Location: Petaluma, CA
May 1, 2015 3:13 pm
Founds this bug today,.
Petaluma, CA. Riparian / farm land
Hot and sunny.
Signature: Kati Jackson

Clytus planifrons

Clytus planifrons

Hi Kati,
Many species of Longhorned Borer Beetles from the family Cerambycidae are excellent wasp mimics, including members of the genus
Clytus.  We believe the individual represented in your images is Clytus planifrons based on its resemblance to individuals posted on BugGuide.  The species is found in California.  On the genus page, BugGuide states:  “C. arietis is called ‘wasp beetle’ in the U” which we suppose should have read “UK” because according to Nature Spot it is “Common and widespread in England and Wales, scarcer in Scotland.”  Had you not stated that your found your individual in California, we might have mistaken it for its Old World relative.

Clytus planifrons

Clytus planifrons

 

 

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Subject: What’s this bug
Location: Washington DC
April 22, 2015 7:14 am
I have now trapped and relocated two of these near the front wall of our brick row house in washington dc. Both were found by one of our cats. What are they and are they dangerous to cats?
Thanks.
Signature: David McMillen

Hickory Borer

Hickory Borer

Dear David,
This is a Hickory Borer,
Megacyllene caryae, a Longhorned Borer Beetle in the family Cerambycidae.  Larvae in this family are wood borers, and adults often have very strong mandibles that they need to chew to the surface when they emerge as adults.  They might provide a painful nip to your cat, but they are not considered dangerous and we feel quite certain the cat will not be harmed.  Do you have a hickory tree nearby?  According to BugGuide:  “larvae mine newly dead hickory, and sometimes other hardwoods.”

Thank you for the quick and informative response. No hickory trees nearby but maybe they wintered in our firewood. We keep a pile inside over the summer and brought in a few of weeks ago.

Emergence from firewood is quite common.

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Subject: Hymenoptera (?) in Classroom
Location: Seattle, WA
April 20, 2015 5:07 pm
A bunch of insects that look like hymenoptera have been congregating in my classroom recently, beginning when the weather got warmer. They are especially in one area of the room that has some natural wood (untreated branches, trunks, etc.) that included as accent decorations of a loft. Some have long antennae and others have short. They have very long hind legs. Their bodies are a rusty brown color with a couple yellow stripes. Their wings are the same rusty color. The wing covers brown with three yellow stripes. I’m a science teacher and love bugs, but need to know if these are potentially harmful to either my students or the physical structure of my classroom. They have so far not shown any aggression, but occasionally do fly and land on students, which distracts from the lessons and scares some students since I cannot confidently assure students they are harmless.
Any pointers would be helpful. Thanks!
Signature: Zoe

Red Headed Ash Borer

Red Headed Ash Borer

Dear Zoe,
This is a Red Headed Ash Borer,
Neoclytus acuminatus, or some other closely related member of the genus.  The appearance of these beetles is most likely connected to the wood you mentioned.  Though it is a beetle, the Red Headed Ash Borer is an effective wasp mimic.

Thanks so much! I’m glad it’s not harmful for my students and it’ll be a good science lesson to incorporate too!
Zoë

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Subject: Possible wasp mimicking grasshopper
Location: Sacramento, CA
April 18, 2015 7:55 pm
My wife saw this out with the kids. It’s springtime here in Sacramento. She said it looked like a grasshopper, but had a sharp looking abdomen that looked a like a stinger. She didn’t think it was a wasp. She did say it was capable of flight, so she couldn’t get any closer to the insect before it flew off.
I’m an avid bug hunter, but I’m new to this area. We keep finding new and different insects that keep stumping me.
Signature: Stumped bug guy

Red Headed Ash Borer

Red Headed Ash Borer

Dear Stumped bug guy,
This Red Headed Ash Borer,
Neoclytus acuminatus, is actually a beetle that mimics a wasp.

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