Currently viewing the category: "Leaf Beetles"
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Unidentified armored insect.
I just spent half an hour or so looking over your site. It is really a great resouce. Most of the time I put the univerity level entomology courses to work and identifiy my own finds, but since my primary goal is to get a good photo rather than collect, kill and key out these days I was unable to (excuse the expression) pin this one down. This well armored and prickley insect was found in the folds of a Canada Thistle. Just as a guess I would guess some sort of hemipteran – but I defer to your expertise on this one. The location is Grand Island, New York – an island in the middle of the Niagara River. If interested, other fauna and flora photos from the island may be viewed at:
Your time in looking at this one and replying is most appreciated. If you can use the image on your site, please feel free to.
Nathan Cook

Hi Nathan,
Before we even venture a guess, we want to contact our favorite expert, Eric Eaton. Meanwhile we will post your image and see if we get any other responses. Eric Eaton responded with this information: ” Looks like that spiny thing is the pupa of a tortoise beetle. The larvae look very similar, but carry an umbrella of dried feces on those forked tail-like appendages. Eric”

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Unidentified Leaf Beetle
I’m pretty sure this is some sort of leaf beetle, although I can’t seem to find which one. Maybe a swamp milkweed leaf beetle? It was photographed along the margins of a small lake (I would call it a pond with water running in and out) not far from the eastern shores of southern Lake Huron. Sure would like to know what it is.

Hi again Nadjia,
This is a Swamp Milkweed Leaf Beetle, Labidomera clivicollis. As its name implies, it lives near swamps, meadows, roadsides with milkweed, especially wetlands with Swamp Milkeed, Asclepias incarnata. The markings are highly variable from individual to individual. We located some information on BugGuide.

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Hi Bugman
I hope you are the person who can tell me what kind of bug that I photographed. This striped bug reminded me of a ladybug when it flew but it has stripes instead of dots. I was walking through a marsh area in southeastern Michigan. Any help you can give me would be much appreciated. Thank you.
Cris Music

Hi Chris,
We wrote to Eric Eaton for more information on your Leaf Beetle from the Family Chrysomelidae. Here is what he wrote: “This is indeed a leaf beetle, probably in the genus Disonycha, one of the larger flea beetles. Can’t give a species without running the specimen through a key, but that should get you in the ballpark to find more info.”

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tomato leaf eating bug
I hate this thing! Tons of them are eating my tomato plants!

Hi Robert,
The closest I can get for you is it is one of the Chrysomelidae, or Leaf Beetles. It looks to be a close relative of the Cucumber Beetles.

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What is this bug??
Hi Bugman,
We have had lots of these little critters in our den lately – and my husband and I have NEVER seen these before- we live in a wooded area in Southern California w/ lots of Eucalyptus trees. We find a few a day lately- and are so curious as to what they are and what they do and where they come from and how we can get rid of them! HELP! Thanks mucho!
Warm regards,
Jody Tsouo

Hi Jody,
Our first thought was perhaps you had some type of beetle larva, but we checked with Eric Eaton who thought that it might be one of the Rove Beetles. Your photo is a little unclear and the fact that you shot through plastic didn’t help.

Thanks for getting back to me- and yes, they do seem to be in somewhat of a larvae stage- when they move, their whole bodies shorten and extend, almost like a lizard or snake. I’ve been obsessed w/ them wondering what they are, and have been watching them quite closely 🙂 I did a search online of rove beetles, and the ones we have look nothing like any rove beetle listed on this site. They don’t move fast at all either- and they tend to “Cling” when you try to grab them. I am having a pest person come over in a little bit to try and identify them- their 6 legs are in the upper quadrant of their body- and when I tried to grab one yesterday, this yellow fluid came out- wasn’t sure if it was waste, or trying to defend itself. It was bright yellow though. I’ll let you know what they say- he said if he couldn’t ID it, he’d send some up to the Cal Agro people… I can try and take some better shots if you want.
Warm regards,
Jody Tsouo

Hi again, Just found out that they may be lady bug larvae- since the pest guy wasn’t 100% sure, he’s sending them to the California Agro people to see what they say- the funny thing is we have seen a few lady bugs around lately- and just thought they were good luck! He did find a few dead lady bugs that were tan in color, and hadn’t fully developed to their red color yet.
Warm regards,
Jody Tsouo

Let us know what the California Agro people have to say Jody. Eric Eaton also agrees. He wrote back: “Ah-HA! The lady beetle larvae answer seems much better, though I would have expected some red markings somewhere….”

Update:  California Eucalyptus Beetle Larva
October 28, 2011
Thanks to a comment from sundeeavila, we now know that this is the larva of a recently introduced species of Leaf Beetle, the Eucalyptus Leaf Beetle,
Chrysophtharta m-fuscum.  The UC Riverside Entomology site has a nice profile on the species that contains this information:  “Eucalyptus leaf beetle is a new pest of ornamental eucalyptus and was introduced from Australia into southern California around 2003. It is not controlled by native parasites or predators. In Australia it is commonly known as one of the eucalyptus tortoise beetle species. It is known as an outbreak pest of commercial E. globules, blue gum plantations in southeastern Australia.”  Here is a matching photo of the larvae.

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NJ Bug?
We just moved into a 1920s cape about 4 months ago. Today I went to open the garage door and saw this bug there. I have NEVER seen this here or in NY before and was mesmerized. It just sat there. Looked like maybe it was gnawing on the wooden garage. It just sat there. I was able to snap this picture without it budging. But about an hour or so later I came back to look for it and it’s gone.
Is it dangerous???
Celia, NJ

Hi Celia,
Your garage is safe, but your potato plants, tomato plants and pepper plants could get eaten by the Colorado Potato Beetle which was originally found only in the Rocky Mountain States. The nationwide commercial growing of agricultural crops is responsible for this pest’s spread far and wide. Both adults and larvae devour leaves.

What's That Bug? does not endorse extermination