Currently viewing the category: "Longhorn Beetles"
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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?
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!

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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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Subject: unknown Longhorn beetle
Location: Central Kalahari, Botswana
April 9, 2015 3:02 am
Hey :)
I have been looking through the forum and the web in search for an ID to these two species. Both of them showed up on the ground in our camp in Central Kalahari. The surroundings are pretty much dominated by different Acacia trees/bushes, however Silver Cluster-leaf (Terminalia sericea) is more abundant just around the camp.
I am collecting all different kind of insects around the farm area where our camp is stationed, to make a species list and show room of the insects you can espect to find during your stay.
It will be a huge help If you can help me out :)
There are pictures of two different species of Longhorn beetles.
Signature: Mathias

Unknown Longicorn #1

Unknown Longicorn may be Pycnopsis brachyptera obsoleta

Dear Mathias,
We did an internet search and we were not able to determine the identity of your Longicorns, so we are posting them as unidentified in the hope that we will eventually be able to provide you with an answer.

Unknown Longicorn #2

Longicorn #2:  Titoceres jaspideus

Update: We just received a comment that these may be Pycnopsis brachyptera obsoleta based on this FlickR image and Titoceres jaspideus which is pictured on iSpot.

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Subject: costa rican longhorn
Location: costa rica cloud forest, north west highlands
April 6, 2015 12:48 pm
Can’t find anything like this on Google.
Signature: jason



Dear Jason,
Your beetle is a Longicorn in the family Cerambycidae, but we have not yet been successful in finding a matching image online to provide an identification.  Your Bycid looks similar to a Costa Rican individual we believe we may have correctly identified as
Taeniotes scalatus, and it looks even closer to two fighting males of that species pictured on the site.  Neither of those, nor any other examples of Taeniotes scalatus we have located online, has markings exactly like your gorgeous specimen, so we doubt they are the same.  Perhaps one of our readers (Markikavana or Cesar or Karl perhaps) can provide an identity.

A couple more photos attached.

Longicorn from Costa Rica

Longicorn from Costa Rica

Karl provides an identification
Hi Daniel and Jason:
Taeniotes is probably the correct genus and I believe the species is T. praeclarus (Cerambycidae: Lamiinae: Monochamini), which ranges from Nicaragua to Bolivia. Taeniotes dentatus also looks quite similar, but the range is given as Ecuador to Bolivia. Regards.  Karl

Thanks so much Karl.  The colors are much more beautiful on the living beetle.

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Subject: bug
Location: oklahoma
April 8, 2015 3:19 pm
i found this today in my car. I also saw one similar to it at my friends house a few months ago…..but maybe not the exact same bug.
Signature: thank you in advance, andrea

Hickory Borer

Hickory Borer

Dear Andrea,
According to BugGuide, the Hickory Borer “larvae mine newly dead hickory, and sometimes other hardwoods.”  Adults are active in the spring.

Sue Dougherty liked this post
What's That Bug? does not endorse extermination