Currently viewing the category: "Longhorn Beetles"
What's That Bug? does not endorse extermination

Subject:  What is the beetle
Geographic location of the bug:  Marlborough, MA
Date: 06/12/2019
Time: 11:04 AM EDT
Your letter to the bugman:  We can’t tell if this is a white spotted Sawyer or a Asian longhorn.
How you want your letter signed:  Cory

White Spotted Sawyer

Dear Cory,
The white scuttelum, between the base of the wings, indicates that this is a White Spotted Sawyer.

What's That Bug? does not endorse extermination

Subject:  Black and yellow striped insect
Geographic location of the bug:  South Wales UK
Date: 05/26/2019
Time: 12:48 PM EDT
Your letter to the bugman:  Found this insect on my patio table in late may. Don’t know wether it relevant but we had just taken a large tree down.  Never seen one before.  It definitely jumps as it jumped straight at me.  Didn’t appear to be making any sounds.  Legs were definitely more of a red orangey colour.  What bug is this?
How you want your letter signed:  Yvonne the gardener

Wasp Beetle

Dear Yvonne the gardener,
Because it is such an effective mimic, this Longicorn in the family Cerambycidae,
Clytus arietis is commonly called a Wasp Beetle.  According to Nature Spot:  “It breeds in the decaying wood of deciduous trees. It can often be found in clear view, resting on leaves in low vegetation. Presumably its yellow and black colours warn off any predatory birds!”

What's That Bug? does not endorse extermination

Subject:  Bright and Lonely in FL
Geographic location of the bug:  St. Petersburg, FL
Date: 05/21/2019
Time: 06:47 PM EDT
Your letter to the bugman:  Hello from sunny Florida! It’s springtime here and I found this bright and lonely guy  (or gal) hanging out by itself for literally hours on the aluminum railing of my porch. It didn’t seem to mind me walking by and taking a picture of it. I wonder if it’s sick/dying because it is in an odd place not reacting to much at all. It walks up and down but I haven’t seen it fly yet. I’m not sure exactly what species this is, although it appears to be some sort of beetle. Of note, there is a small spider that created a web in the corner of my porch ceiling. I’m not sure if maybe the spider is after this unusual looking beetle or if the beetle is after it and that’s maybe why it’s creeping so slowly! Help with identification and info on if I should be worried about anything like harm to my house, plants or the poor lonely beetle itself, would be greatly appreciated! 🙂
How you want your letter signed:  Thanks so much! ~Alicia

Longjawed Longhorn Beetle

Dear Alicia,
This magnificent beetle is a Longjawed Longhorn Beetle,
Dendrobias mandibularis, and the smaller mandibles indicate this is a female.  The males have very impressive mandibles.  According to BugGuide:  “Hosts: Citrus, Parkinsonia, Salix, Celtis.

What's That Bug? does not endorse extermination

Subject:  Beautiful beetle
Geographic location of the bug:  Central Ohio
Date: 05/07/2019
Time: 07:09 PM EDT
Your letter to the bugman:  Found this gorgeous beetle on my arm.  May 7th 2019.  In a lightly wooded area with nearby stream. At first I thought it was an ant, but the antenna look like a beetle.  The texture of the abdomen is like a blister beetle.
How you want your letter signed:  Jennifer Huffman

Ant Mimic Longhorn Borer Beetle

Dear Jennifer,
We were impressed with how much this Longhorned Borer Beetle in the family Cerambycidae resembled an Ant, so we researched that and located this image of
Cyrtophorus verrucosus on BugGuide.  According to BugGuide:  “Ant mimic. Distinctive markings, and note also knobs at base of pronotum” and “Adults take nectar and/or pollen on spring-flowering trees and shrubs.  Larvae feed on a wide variety of hardwoods, including Acer, Betula, Carya, Castanea, Cercis, Cornus, Fagus, Quercus, Ulmus, & Pinus.

Ant Mimic Longhorned Borer Beetle

Wow super cool!   I won’t tell you how many long horned beetles I looked at late last night trying in vain to find something like this.  Too bad I couldn’t get better pictures, maybe I should have chilled him too!
Thanks so much for the fascinating info and for saving my sanity.

Hi Jennifer,
BugGuide does indicate:  “A remarkable ant mimic, this species runs like an ant.”

What's That Bug? does not endorse extermination

Subject:  Some kind of borer beetle?
Geographic location of the bug:  Napa Valley, California
Date: 04/29/2019
Time: 06:04 PM EDT
Your letter to the bugman —
Hello! This morning I saw this beetle sipping from a tree. It’s the biggest one I’ve ever seen outside of a zoo, probably about half the size of my index finger. And looks to be pregnant too! Any idea what it could be?
How you want your letter signed:  Christine

Longhorn:  Stenocorus species

Dear Christine,
This is very exciting.
We agree that this appears to be a Longhorned Borer Beetle in the family Cerambycidae, and the size you indicated is quite impressive.  We did not recognize this Beetle, and the width of the abdomen at the base of the elytra is considerably wider than the thorax, and the thorax is unusual in its shape.  On a lark, we decided to search Cerambycidae and Napa Valley and we found
Vandykea tuberculata pictured on the Cerambycidae Catalog Search, and it does seem to resemble your individual.  We found a single posting on BugGuide and the common name Serpentine Cypress Long-Horned Beetle and the remark:  “on California’s “Special Animals” List.”  We believe this might be a very rare sighting, and we are seeking assistance from Eric Eaton and Doug Yanega to get their opinions.  We will get back to you on this.  We also have selected this posting to be the Bug of the Month for May 2019, and we really hope our initial research has produced a correct identification so we can research this species more.  If that is a correct identification, according to Nature Serve Explorer:  “Critically Imperiled” and “An extremely rare endemic restricted to serpentine cypresses in the Clear Lake area in Lake County, CA.

Longhorn:  Stenocorus species

Correction Courtesy of Doug Yanega
Hi. This is a large female Stenocorus, either vestitus or nubifer. They
are difficult to distinguish based on photos.
Doug Yanega      Dept. of Entomology       Entomology Research Museum
Univ. of California, Riverside, CA

Ed. Note:  Of the two species, BugGuide has information on Stenocorus vestitus which states:  “hosts: Pinaceae (Pinus, Pseudotsuga, Tsuga); adults on flowers”

Wow, thanks so much! It’s always exciting to see new bugs in the spring and summer.

What's That Bug? does not endorse extermination

Subject:n  What is this?
Geographic location of the bug:  Eastern Pennsylvania 19504
Date: 03/30/2019
Time: 09:56 AM EDT
Your letter to the bugman:  Second one of these we found in our home this week.  One in our living room, one in our kitchen. Wondering what it is and if we may have more. Found mid to late March 2019. Legs damaged in capture.
How you want your letter signed:  Curious homeowner

Spined Oak Borer

Dear Curious homeowner,
Do you have a fireplace or wood burning stove and do you store firewood inside the home?  This is a Spined Oak Borer,
Elaphidion mucronatum, which we identified on BugGuide, and according to BugGuide:  “Extremely polyphagous; hosts include most eastern hardwoods & shrubs.  Also noted in bald cypress (Taxodium distichum)” and “Eggs are laid beneath bark of dead hardwoods. Larvae feed beneath the bark for the first year and feed deeper the second year.”  Adults do not feed on wood.  We are presuming the individuals you found in your home emerged from wood you brought indoors.

What's That Bug? does not endorse extermination