Currently viewing the category: "Beetle Larvae"
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Stupid Question?
Location: southern indiana
September 11, 2011 10:52 pm
Is this grub worm the larva of this pinching bug? It seemed to be guarding all 5 grub worms with it’s life .Just curious thank you
Signature: brian

Big Headed Ground Beetle

Hi Brian,
The beetle is a Big Headed Ground Beetle, Scarites subterraneus, or another member of the genus.  Interestingly, BugGuide has no photos of the Grubs from this genus.  Most Ground Beetles have active larvae that are also predators.  The Grub image that you submitted looks more like the larva of a Scarab Beetle.  Even more interesting is that this is the second letter we have received (the first was earlier this year in May) indicating some reason the Big Headed Ground Beetles are found in close proximity to Scarab Grubs.  We are going to try to get Eric Eaton to comment on this.

Scarab Beetle Grub

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No Clue
Location: Western Massachusetts
September 11, 2011 1:41 am
Hello Mr. Bugman, I have searched the Internet trying to identify this crazy little bug. It was found under the covers of a bed that’s not used very often. It has little hairs all over its carrot shaped body and long grey hairs that protrude from it’s hind section. Turned over, it looks like six legs near the widest part, or head section. I could only see these features with a jeweler’s loop. I would say the bug measures 3/64” wide x 1/4” long half body half tail. Thanks for the help
Signature: Bugman

Carpet Beetle Larva

Dear Bugman,
Just yesterday we posted another image of a Carpet Beetle Larva.  We believe your Carpet Beetle Larva is the larva of a Black Carpet Beetle in the genus
Attagenus based on this image posted to BugGuide.

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What is this?
Location: Anchorage, Alaska
September 4, 2011 7:31 pm
I saw these bugs eating an alder bush in my yard up here in Anchorage Alaska. I am wondering what they are and if I need to do anything about them. They are all over the alder bush.
We noticed that when they are touched the white spots on them pop out. I can’t find anything about them online.
Signature: Erica

Leaf Beetle Larvae

Hi Erica,
These are Leaf Beetle Larvae, and we believe we found a good match on BugGuide that is identified as
Chrysomela aeneicollis, and the photo is from Alaska.  We would also admit that we are not certain of the species, since larvae are often difficult to identify with certainty, but we are relatively confident that we have the genus Chrysomela correct.  Here is another similar looking unidentified larva from the genus Chrysomela, also from BugGuide.  If you read the comments on this posting on BugGuide, you will see that the larvae are capable of emitting drops of odorous liquid from the white tubercles, which supports what you have written.  Our one reservation is that from what we have read, beetles in the genus Chrysomela feed upon willow and poplar, and we haven’t found any indication that they feed upon Alder.

Leaf Beetle Larva

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What’s this bug?
Location: Fox Chapel, PA
September 4, 2011 5:28 pm
I took these photos on July 14th around 11:30 am at Beechwood Farms Nature Reserve in Fox Chapel which is about 15 minutes East of Pittsburgh, Pennsylvania. It was a bright sunny day and the brown case that this bug appeared to be carrying around and sheltering beneath caught my eye on a leaf.
Signature: Linda Willhide – Volunteer Naturalist for the Audubon Society of Western Pennsylvania at Beechwood Farms Nature Reserve

Case Bearing Leaf Beetle Larva

Hi Linda,
This is the larva of a Case Bearing Leaf Beetle in the subfamily Cryptocephalinae, though we cannot provide you with a species name.  According to BugGuide:  “As far as known, the larval stages are all casebearers, living in and protected by a case constructed of their fecal matter and sometimes plant debris. The case is shorter than the larva that remains folded inside it.”  Here is a photo from BugGuide that looks very close to your individual.

Case Bearing Leaf Beetle Larva

Thanks so much for identifying it!
I looking forward to sharing this information with my fellow naturalists and the children on the educational nature walks.
Have a great day!
Thanks again,

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late summer bug party
Location: Silver City NM
September 1, 2011 6:08 pm
These pics are from last year, but the same thing is happening again. On my Navajo globe willow, the green beetles seem to be doing something that attracts the brown butterflies. Also, there’s a funny fuzzy little guy in there too. What is going on? What are these bugs?
Signature: hwecks

Sap Party with Mourning Cloak and Figeater

In England, the butterfly known as the Mourning Cloak in America,  is called the Camberwell Beauty.  The metallic green beetle is a Figeater.  The other creature is the larva of some soft winged beetle.  The tree is oozing sap and that doesn’t seem like a good thing.  The tree may have Borers.  We hope you allow this exciting coeval feast to continue and closely observe the insects that come to the sap.  Setting up night lights will attract moths, and many gorgeous Owlet Moths will be attracted to the luscious liquid diet.  The Mourning Cloak will most likely begin hibernation as winter approaches.  Your winters are likely quite mild, and the Mourning Cloak will not have to survive months of frozen conditions.  This good meal of sugary sap would likely contribute to the survival of Mourning Cloaks in more hostile climates than that in Silver City, New Mexico.  

Thanks for the prompt reply.  I’ll set up lights this weekend.

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Red Bug
Location: Safford, Arizona
August 20, 2011 6:59 pm
Can You identify this bug? Found in the Arizona desert on top of Mt Graham near Safford.
Signature: Zombiemarble

Potato Beetle Larva

Dear Zombiemarble,
This is a Leaf Beetle Larva in the family Chrysomelidae, and larvae can often be quite difficult to properly identify.  Knowing the food plant is often a tremendous assistance.  There is a strong resemblance to the larva of the Colorado Potato Beetle (see BugGuide), however, this is not a Colorado Potato Beetle larva.  We suspect it is another member of the genus, or perhaps a closely related genus.  Though BugGuide does not picture the larva, circumstantial evidence leads us to speculate that this might be the larva of the Reddish Potato Beetle,
Leptinotarsa rubiginosa, a species only reported from Arizona on BugGuide.

What's That Bug? does not endorse extermination