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Household Intruder: Bark Beetle or Ambrosia Beetle

Tiny bugs on windowsill
January 11, 2010
Every hour I have to vacuum these MANY tiny bugs from my window sills in the front room of my home. They sometimes appear on my kitchen stove (although less often), and the kitchen window sill as well. Most of the time they are either dead, or are dying (or they appear to be). I have even found them crawling on my neck! I can’t seem to find out how they are getting in my home, although i suspect they are crawling in through cracks or small openings in and around the windows. They seem to accumulate near the window where my wood stove is located. Thank you for your help in identifying these pests, and please let me know if I need to exterminate.
Baffled New Englander
Southeastern Massachusetts

household beetle unknown 300x206 Household Intruder:  Bark Beetle or Ambrosia Beetle

Bark Beetle or Ambrosia Beetle

Dear Baffled,
WE are also a bit puzzled.  The distinctive shape of your beetle and the clubbed antennae disqualifies most of the typical household pantry beetles we typically identify.  We have eliminated the North American Flour Beetle, Tribolium brevicornis, which can be viewed on BugGuide.  We believe your culprits are in the superfamily Bostrichoidea, which contains many household intruders, including Carpet Beetles, Powder Post Beetles, Deathwatch Beetles, and Spider Beetles, but we had no luck sorting through the superfamily on BugGuide.  We can tell you what it is not, but not what it is.  It is the middle of the night, and we will have to wait until tomorrow for a response, but we hope Eric Eaton will have more luck with the identity of this curious specimen.

Eric Eaton provides information
Daniel:
Good news:  The beetles are not infesting any foods in the pantry, or clothing in the closet.  The image shows some kind of bark or ambrosia beetle, family Curculionidae, subfamily Scolytinae.  I am not a specialist in these, but I do know someone who is (Dr. Stephanie Dole), and will see what she has to say.  I’d bet these are emerging from stored firewood.
Eric

I’m very relieved to hear that! Thank you very much! I wonder, though, why these bugs seem to be coming in from where the windows are (One window is about 2-3 feet away from the wood stove). Our firewood is stored outside, and only brought in as needed. If they are somehow in/on the firewood, how did they get on the windowsills? We have two Bay windows, and each are approximately 9-10 feet apart from one another.
[Baffled]

What's That Bug? does not endorse extermination

Weevil in Australia

Are these bed bugs?
December 12, 2009
Hi,
I’m living in Sydney Australia in an apartment and in the last month (summer just started) my place has become infested with these bugs. They seem to have pointy and long mouth parts. They climb the walls, fall, and then get stuck in the carpets… I have attached 2 pics using a microscope (4X magnification). One is a dead bug and the other is immersed in oil to get it to stay still. They are both 0.2 cm long. Your help would be greatly appreciated. Thanks.
EAW
Sydney Australia

weevil australia eaw 300x196 Weevil in Australia

Grain Weevil

Hi EAW,
This is a Weevil, and we suspect it may be infesting some food product in the pantry, possibly rice.

Thank you!
Thank you so much for your quick reply. I have found the culprit. A 5 kilo bag of wild bird seed in the closet.
Thanks again.

Unknown Weevil from Chile

Three unknowns from Torres del Paine, Chile
December 6, 2009
I’ve looked through the categories I can think of for these three (moths, butterflies and beetles) and don’t see matches nor have I found them online with basic searching. All were photographed in Torres del Paine national park, Chile and were unharmed. …
The beetle was seen twice and this is the better shot. In both, there’s a bright orange/red spot on that one leg. Eggs perhaps? They were about 3/4″ long x 1/4″ wide Jess, Minnesota
Torres del Paine, Chile

weevil chile 300x232 Unknown Weevil from Chile

Unknown Weevil and Mite

Hi Jess,
We posted the beetle separately from the butterflies.  This is a Weevil, and the red spot is a Mite.

What's That Bug? does not endorse extermination

Nut or Acorn Weevil, we think

What is this thing?
October 25, 2009
I found this bug on the edge of my fishtank. It is now October 25th.
Tree C.
Central Florida

nut weevil tree 300x206 Nut or Acorn Weevil, we think

Nut or Acorn Weevil, we believe

Hi Tree C.,
This is a Weevil, a member of the largest family of Beetles.  Often exact identification from a photo is impossible.  That said, we believe this is a Nut Weevil or Acorn Weevil in the Tribe Curculionini.  There are several images that look similar on BugGuide, but they are not identified to the species level.

nut weevil 2 tree 300x251 Nut or Acorn Weevil, we think

Nut Weevil or Acorn Weevil, probably

Citrus Root Weevil

Please dear bug people
September 5, 2009
This bug was chewing on a Zanthoxylum flavum in Bahia Honda SP.
Susan
Bahia Honda Key, Florida Keys

citrus weevil susan 217x300 Citrus Root Weevil

Citrus Root Weevil

Dear Susan,
WE believe this is one of the Citrus Root Weevils in the genus Pachnaeus.  There are two species indicated on BugGuide
, the Blue-green Citrus Root Weevil, Pachnaeus litus, and the Northern Citrus Root Weevil, Pachnaeus opalus.  We don’t believe we can distinguish which species you have.  BugGuide does not provide any information on the food preferences nor the life cycles of these Citrus Root Weevils.  Apparently both species are native, but citrus is not native, so it is entirely possible that your Zanthoxylum flavum or West Indian Satinwood is a native host.  The larvae of the Citrus Root Weevils feed on the tree roots, but adults generally feed on leaves as your photo indicates.  We located a pdf online entitled Pachnaeus Root Weevils in Peach at Gainesville by W.B. Sherman that may have information you find helpful.  Other information we found indicates that this native species is never plentiful enough to cause significant damage.

Little Leaf Notcher Weevil, we believe

Beetles Eating My Jamaica Dogwood
August 24, 2009
I was planning on using insecticide to control them ( between these, mealy bugs, and a massive scale infestation I’m getting desperate) but while I was taking these photos a Dingy Purplewing butterfly landed on the tree so I may just have to learn live with them.
Tad
Cutler Bay, FL

leaf notcher weevil tad 234x300 Little Leaf Notcher Weevil, we believe

Little Leaf Notcher Weevil

Hi Tad,
We are relatively certain that this is a Little Leaf Notcher Weevil, Artipus floridanus.  We did a web search of “white weevil florida and were quickly led to a BugGuide page.

leaf notcher weevil tad 2 192x300 Little Leaf Notcher Weevil, we believe

Little Leaf Notcher Weevil

I didn’t realize it was a weevil, I kept looking at leaf beetles.
After a closer look it turns out to be this weevil:
http://www.whatsthatbug.com/2008/02/23/little-leaf-notcher-weevil-invasive-species-from-sri-lanka/
According to this document ” http://www.doacs.state.fl.us/pi/enpp/ento/entcirc/ent412.pdf ” many of the host plants are in my yard.
Thanks again

Weevil from Puerto Rico: Green Immigrant Leaf Weevil

Unknown weevil Costa Rica
July 17, 2009
Hi WTB!!
I have a photo of a weevil as my screensaver that looks a lot like the glittery weevil you are having trouble identifying. I took the photo from one of your reader’s website. You can view more photos of the weevil there. Father Sanchez has it listed as Polydrusus and he is located in Puerto Rico. http://www.kingsnake.com/westindian/
Keep up the great work!
Andrea with the anatomically correct butterfly tattoos icon smile Weevil from Puerto Rico:  Green Immigrant Leaf Weevil Hollywood, CA
Puerto Rico

polydrusus weevil father sanchez 300x217 Weevil from Puerto Rico:  Green Immigrant Leaf Weevil

Green Immigrant Leaf Weevil

Hi Andrea,
How nice to hear from you again.  We have also had email exchanges with Father Sanchez.  We love his website.  We are linking to BugGuide’s page on the Green Immigrant Leaf Weevil, a European species that has naturalized in North America.  Though we are inclined to agree that this weevil and our Costa Rican Weevil look the same, we would really like to get an expert opinion on that.  Thanks so much for providing this information.

Unknown Costa Rican Weevil may be Green Immigrant Leaf Weevil

Wood carved and glittered weevil
July 13, 2009
Hi bugman-
I recently went to Costa Rica for my honeymoon (6/21-6/28) and came back with tons of pictures…of insects. I thought I’d share these pictures of a weevil I saw one night climbing up a wall. We were on our way to dinner, camera in tow, when out of the corner of my eye I saw a glittering green, gingerly moving splotch. Upon closer inspection, I noticed that it was a beetle. This little dude looks like someone carved him out of wood and then had their child sprinkle a spring shade of glitter all over its back. He didn’t want to stay too still, but decided that he’d pose for a couple of shots…hope you like him.
insect fan
Costa Verde, Manuel Antonio, Costa Rica

weevil glitter costa rica 300x236 Unknown Costa Rican Weevil may be Green Immigrant Leaf Weevil

Green Immigrant Leaf Weevil perhaps

Dear insect fan,
We are a bit stumped by your weevil, and we hope one of our readers will be able to assist in the identification.  It really does look like it has been embellished with glitter.  We do know that in certain places in Central America, insects are used as living jewelry.  Sometimes beautiful insects are just affixed to small chains and pinned to clothing.  Other times insects may be painted or bejeweled. This image does almost look to “glittery” to be natural.

Update
Unknown weevil Costa Rica
July 17, 2009
Hi WTB!!
I have a photo of a weevil as my screensaver that looks a lot like the glittery weevil you are having trouble identifying. I took the photo from one of your reader’s website. You can view more photos of the weevil there. Father Sanchez has it listed as Polydrusus and he is located in Puerto Rico. http://www.kingsnake.com/westindian/
Keep up the great work!
Andrea with the anatomically correct butterfly tattoos icon smile Unknown Costa Rican Weevil may be Green Immigrant Leaf Weevil Hollywood, CA
Puerto Rico

Hi Andrea,
How nice to hear from you again.  We have also had email exchanges with Father Sanchez.  We love his website.  We are linking to BugGuide’s page on the Green Immigrant Leaf Weevil, a European species that has naturalized in North America.  Though we are inclined to agree that this weevil and our Costa Rican Weevil look the same, we would really like to get an expert opinion on that.  Thanks so much for providing this information.

Update from Karl
August 6, 2009
Catching up on weevils (3 in 1 – sorry about that)
Hi Daniel:
The first part of this is just FYI – a great internet resource. I found a little time to go back and catch up on some wonderful weevils that caught my attention as they were posted.  One of my favorite resources for this sort of thing is the digitized version of the Biologia Centrali-Americana (58 volumes!). It is a little difficult to navigate through, but what an incredible storehouse of information! The volumes on insects were originally produced between 1879-1915, but they still stand up as an incredible body of work. The two Costa Rican weevils were identified from this site. Cheers.  K

Daniel:
The Green Immigrant Leaf Weevil (Polydrusus sericeus) is a relatively tiny (5-7 mm) weevil accidentally introduced from Europe. Although it has become wide spread in North America (I have seen quite a few this year on the Canadian prairies), I don’t know if it has made it as far south as Costa Rica. I think this gorgeous creature is actually in the genus Exophthalmus (a reference to those big, bugged-out eyes?), and the species is probably E. carneipes (Curculionidae: Entiminae).  At 9-12 mm it is roughly twice as large and could certainly catch someone’s attention climbing up a wall. I couldn’t find out much about the species, other than that it occurs in Costa Rica and Panama. A great find and a very nice photo from “insect fan”.  There is another very nice image of the same (unidentified) weevil here.
Regards.
Karl


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