Currently viewing the category: "Beetles"
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Subject: Tale of two beetles
Location: Southern California, USA
May 20, 2015 2:45 pm
Hello Bugman!
I recently pulled the included two beetles from my Lindgren beetle trap. In our area here in southern California we’ve had large numbers of Pine trees in the area killed off by some type of pest. My trap is about 40 feet from several pines of various types. The trap has a generic methanol lure and one specific to western pine beetle.
I’d like to find out if the two beetles (image attached) are pests or just native harmless beetles. The one brown beetle is about 2/3 the size of a June bug (may be a small one) though their season is still about 4 weeks away normally.
The black beetle I’ve never seen before and it’s about 0.5 inches in length.
About 20 miles from my location the polyphagous shot hole borer has also been located.
Any help in Identifying these beetles would be greatly appreciated.
Thanks,
Signature: Eric

Engraver Beetle, we believe

Horned Powder-Post Beetle

Dear Eric,
We believe, but we are not certain, that this is an Engraver Beetle in the genus
Ips, based on an image of a False Five Spined Ips in “Insects of the Los Angeles Basin” by Charles Hogue, where it states:  “The adults of this species are very small (1/4 in., or 3 mm, long) and dark brown.  The prothorax is large and partly conceals the back of the head; the wing covers are finely haired and have linear series of punctures’ the antennae are clubbed.  The species develops under the bark of pines — in our area, primarily Monterey Pine.  Usually only unhealthy or cut trees are attacked, but healthy trees are sometimes infested.  The larvae make fine tunnels through the growth layer beneath the bark, and these tunnels may connect, girdling and killing the tree.”  BugGuide has a single dorsal shot of this species, but other members of the genus pictured on BugGuide have a similar profile.  The University of California Integrated Pest Management page includes the genus Ips in the table of Bark Beetles common in Southern California landscapes.  We will try to seek opinions from Eric Eaton and Arthur Evans.  Your other beetle looks like a May Beetle, commonly called a June Bug.

Hello Daniel,
Thank you very much for the quick reply.  Time to do some more research on the little beetle.
Thanks again.  I measured the beetle in question and he is 11mm long.  So almost 3 times the length of the Ips Engraver beetle.
http://cru.cahe.wsu.edu/CEPublications/FS085E/FS085E.pdf
So perhaps he is something a little different.  Or a giant 😛
Eric

Arthur Evans provides a correction
This is a bostrichid beetle, not a bark beetle. Where is it from? Size? Any other details might help to narrow down its identity.

Ed. Note:  Our response to Arthur Evans was:  “It is from Southern California and it is about .5 inch long” and we are now awaiting further information on this Horned Powder-Post Beetle in the family Bostrichidae where, according to BugGuide:  “Most species attack wood, either living, or in some cases, dead, including seasoned lumber. A few are associated with woody fungi or stored grain.”

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Subject: looks like devils coach horse
Location: ta248pq
May 19, 2015 6:42 am
a friend found this bug in west somerset England. we think it looks like a devils coach horse but bigger about 30mm long. can you help
Signature: Barry

Oil Beetle

Oil Beetle

Dear Barry,
At first we thought this was going to be a routine identification of an Oil Beetle in the genus
Meloe, and the only item of significance is that all of our many reports are from North America and we did not realize that the genus was represented in Europe.  As we commenced research, we were led to BugLife where we learned:  “Oil beetles are incredible insects, but they are also under threat. Three of UK’s native oil beetles are now extinct, and the remaining five species have suffered drastic declines in their distributions due to changes in the way our countryside is managed. …  Oil beetles have been identified as priorities for conservation action through the UK Biodiversity Action Plan (UKBAP) – meaning work needs to be done to conserve them and their habitats. To help landowners and managers our oil beetle management sheet is now available. ”   Another page on BugLife provides this information:  “Oil beetles are conspicuous, charismatic insects which are often encountered when out walking and enjoying the countryside. Their habit of seeking out bare compacted earth in which to dig nest burrows means that they are frequently seen on footpaths. The best time of year to look for oil beetles is March to June.
Please keep a look out for these beetles when walking in meadows, grasslands and open woodlands and let us know if you find them by submitting your sighting records and uploading your photos. Your records can make a real difference to our oil beetle conservation work.”
  We would urge you to be a citizen scientist and submit your sighting.  Since neither BugLife page included images of Oil Beetles, we are also linking to this BBC Earth News page where it states:  “Conservationists are asking the public to take part in the first survey of the UK’s threatened oil beetles.  These large, lustrous insects thrive in wildflower-rich grasslands and heaths – areas of habitat that are being lost.  In the last hundred years, half of the country’s eight native species of oil beetle have disappeared.”  We are featuring your submission.

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Subject: bugs on my weeping willow
Location: south east, north sc
May 20, 2015 3:08 am
These are all over my weeping willows and eating all the leaves.
Signature: paula

Cottonwood Leaf Beetle Pupa

Cottonwood Leaf Beetle Pupa

Dear Paula,
This is a beetle pupa, and we were immediately struck by its resemblance to the larvae of the Cottonwood Leaf Beetle that we just posted.  We did a quick internet search and our suspicion was confirmed on Featured Creatures.  We are certain that this is the pupa of a Cottonwood Leaf Beetle,
Chrysomela scripta.

Thank you so much. I’ve got to get rid of them. They are on just about every leaf of my weeping willows and in my birdfeeders. I would hope the birds would eat them. But it’s not happening. The leafs on my willows are just about gone.

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Subject: whats this bug – san diego
Location: San Diego
May 19, 2015 3:36 pm
Hi Bugman, great responses!!
Signature: Jen

Broad Nosed Weevil

Broad Nosed Weevil

Dear Jen,
We were quite certain your beetle is a Weevil, and though we did not recognize it, we found its overly developed front legs to be a very distinctive physical feature.  As we searched the internet for an identification, our first lead was to Arizona: Beetles, Bug, Birds and more where we found an image identified as
Pandeleteius buchanani.  Not an exact match, it looked similar enough to cause us to search BugGuide where we found a California relative in the same genus, Pandeleteius defectus, but alas, there is no information posted on the species.  The species is also pictured on SoCal Fauna, but again there is no specific information so we cannot provide any information on the diet of this Broad Nosed Weevil.

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Subject: Beetle in House in Ohio
Location: Western Ohio
May 19, 2015 9:44 am
Recently this big has been popping up primarily in our bedroom and bathroom on the southeast side of our house. We found some dead ones in our closet but the rest have been pretty random. We find maybe 1-3 a day. They have a hard shell. They have been found crawling across the carpet, under a pillow on the bed, and in the sink. My husband put one in water and they don’t seem to mind it. They play dead as well. Are these guys something we should be concerned about?
Signature: Tiffany

Click Beetle

Click Beetle

Dear Tiffany,
Based on images posted to BugGuide, this looks like a harmless Click Beetle in the genus
Aeolus.  We don’t know why they are entering your home unless they are attracted to lights.  According to BugGuide:  “adults in grasslands, fields, gardens; larvae live in the soil” and “larvae may be a minor pest of corn and potatoes.”  Do you live near a cornfield?

We live on the edge of a suburb, but there are fields within a mile or so of us. They don’t seem to bother us and we aren’t being swarmed by them so I guess we won’t let it concern us too much! Thanks for the identification :)
Tiffany Kohler

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Subject: What is this bug?
Location: Suffolk, Virginia
May 17, 2015 1:14 pm
These little bugs are all over my deck, and the willow tree nearby. What are they, and how can I get rid of them?
Signature: Robin Moore

Cottonwood Leaf Beetle Larva

Cottonwood Leaf Beetle Larva

Dear Robin,
You are being troubled by Cottonwood Leaf Beetle Larvae,
Chrysomela scripta, and according to BugGuide, it:  “used to be considered a pest when willows were grown commercially for baskets, now of little economic consequence.”  Featured Creatures has a very nice page on this species where it states:  “The cottonwood leaf beetle, Chrysomela scripta Fabricius, is one of the most economically-important pests of managed cottonwood, aspen and some poplar and willow species. Although it does not present a serious pest problem in forests, often it is a severe pest of urban ornamental trees. This leaf feeder has several generations each year, may cause extensive leaf loss, and can consequently reduce stem volume up to 70% (Coyle et al. 2005).”

Cottonwood Leaf Beetle Larvae

Cottonwood Leaf Beetle Larvae

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