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

Subject: Bugs on Quercus ilex (Spain)
Location: Salamanca (Spain)
February 20, 2017 6:14 am
I enclose three pictures of two bugs (larva and adult) found on young Quercus ilex (inside). The larva is about 25 mm and de adults about 2 mm. They were found in Salamanca (central western Spain).
They don’t look like the usual borers in the area.
Thank you very much
Signature: Luis Carlos Jovellar (Salamanca, Spain)

Round-Headed Borer

Dear Luis,
The images of the larva you submitted appear to be Round-Headed Borers, a general name for the larvae of members of the Longhorned Borer Family Cerambycidae.  See this BugGuide image for comparison.  They are unrelated to the adult insects you submitted which we will address at a later date.  Knowing the host plant is often a tremendous assistance in the identification of larval stages.  According to the opening sentence of a scholarly article we located on Springer Link:  “
Cerambyx welensii Küster is one of the greatest threats to Quercus suber L. and Quercus ilex L. in Spain.”  While that is not a definitive identification for the Round-Headed Borer you sighted, chances are good that it might be a correct identification.  iNaturalist has an image of the adult.  Your larva has a distinctive yellow coloration.  The Espiritu de Arbol blog has images of adults and larvae.

What's That Bug? does not endorse extermination

Subject: Beetle
Location: Portland, Oregon
February 19, 2017 5:13 pm
I found this beetle indoors today. I think it is a Golden Buprestid Beetle. I want to know if it is a good bug or a bad bug.
Signature: Lois Biz

Golden Buprestid

Dear Lois,
We agree that this is a Golden Buprestid, but when it comes to insects, “good” and “bad” are such relative terms.  Since the native range of the Golden Buprestid includes Oregon, this is a native species for you and native species occupy a place in the food chain as well as in the complicated, interconnected web of life in an ecosystem that we feel compelled to maintain that all native species are good in the overall scheme of things.  Introduced species can throw off the balance of life in a geographic region to which they have been introduced if they have no natural enemies to help control their populations, so we often consider introduced species to be problematic in their new homes, a consideration that lead to the creation of the Invasive Exotics tag on our site many years ago.  According to the genus page on BugGuide:  “Larvae feed on wood of various conifers and deciduous trees, incl. Fagus (Beech), Populus (Cottonwood), Acer (Maple), and Quercus (Oak).”  It is our understanding that native Metallic Borer Beetles are never plentiful enough in their native surroundings to do significant damage to healthy trees, unlike the related and introduced Emerald Ash Borer that has decimated populations of Ash trees in eastern North America.  As a point of interest, Golden Buprestids have been known to emerge many years after lumber has been milled.  Seems milling the lumber slows the maturation process, but the larvae are able to survive and continue to feed on the dead wood.

What's That Bug? does not endorse extermination

Subject: What is this insect
Location: Nsw
February 18, 2017 7:28 pm
Hi just wondering what this is
Signature: Bug identification

Feather Horned Longicorn

Based on images posted to Project Noah and to the Worldwide Cerambycidae Photo Gallery, we are quite confident this is a Feather Horned Longicorn, Piesarthrius marginellus.

What's That Bug? does not endorse extermination

Subject: is this a bed bug?
Location: Richmond VA
February 17, 2017 11:08 am
This found in bed with others. None of the characteristic flat bed bugs were found. It’s tiny- only a few millimeters. I took the photo using a stereomicroscope.
Signature: Bugging out

Smooth Spider Beetle

Dear Bugging Out,
This is NOT a Bed Bug.  It is a Smooth Spider Beetle,
Gibbium aequinoctiale, and we verified its identity on BugGuide.  According to BugGuide:  “wide variety of dead organic materials; may be a dry stored product pest.”  They are relatively common household pantry pests.

What's That Bug? does not endorse extermination

Subject: Unknown household insect
Location: Winter Park Fl 32792
February 17, 2017 8:35 am
Dear Bugman,
I find this bug in copious numbers on the floor and along the baseboards in my home. They are in multiple, nonapproximateing rooms and are almost always dead. Please identify them for me and tell me what, if any, action I can take to rid my house of this population. Excuse the lack of magnification, this is as close as I can come with my iPad.
Signature: Frederic Bryant

Grain Weevils

Dear Frederic,
These are Grain Weevils, and you need to locate the source of the infestation.  Start with rice in the pantry or that big bag of bird seed you have stored somewhere.  They will also infest bargain bags of pet food.

Mr. Marlos,
Thanks for your prompt reply! I will get right on the case and see if we have any of those items you mentioned lying around loose.  I will also lace the areas with a residual insecticide. Thanks again for your prompt service.
Frederic Bryant

What's That Bug? does not endorse extermination

Subject: What’s this beetle
Location: North East Los Angeles
February 15, 2017 11:21 pm
Found this beetle on the floor of our house in the Montecito Heights area of Los Angeles. Can you let us know what it is?
Signature: Thanks,

Woolly Darkling Beetle

Greetings from Mount Washington, right across the Arroyo Parkway from you.  We recognized your beetle as a member of the Darkling Beetle family Tenebrionidae, so we turned to Charles Hogue’s “Insects of the Los Angeles Basin” and we located your Woolly Darkling Beetle, Cratidus osculans, on page 299 where it states:  “It is often seen in vacant lots and along paths through brushy or wooded areas.”  Based on BugGuide, the genus has been reclassified as Eleodes osculans.

What's That Bug? does not endorse extermination