Wood Boring Beetle Grub and subsequent Controversy

I have never seen anything like this befor here in Michigan.
Evan Owens

Hi Evan,
Please give us some context. Did you find it in the bathroom? We don’t think so. Did you find it in the pantry? We don’t think so. Was it crawling across the driveway? We don’t think so. Was it eating the leaves on your rose bush? We don’t think so. We believe it was found in a wood pile. This is the Grub of a Beetle in the Family Cerambycidae, the Long Horned Borers. They spend their lives feeding on wood, pupate inside the stump and emerge as winged adults.

Dear Bugman I found this bug (Wood Boring Beetle Grub) in the yard and it’s all sand I was working in Rosscommon on a house in the woods but about 1 acre of it is all sand where i found it .no grass and no wood pile and no wood in the imediate area, but was close to the driveway. Thank you again for your help.

Hi again Evan,
We have a new theory. Perhaps the grub was living in cut lumber. There are species that can emerge as winged adults years after construction.

We stand chastised
(09/30/2005) Hi. My friends and I read your site daily to look at all the fastinating new bugs. We were quite dismayed with your reply to Evans Owens who sent you a picture of the wood boring beetle grub. Were you courteous? WE DONT THINK SO. Were you pleasant? WE DONT THINK SO. Were you nice? WE DONT THINK SO. Were you polite? WE DONT THINK SO. We think that since you are in the “public eye”, that you should not chastise the people who write to you for help. What good really would it have done if he told you where he found it? On July 17th, this year, Dave and Wendy told you they found a pseudoscorpion in a box of cereal. Did that help you identify it? WE DONT THINK SO !!!

Hi there, This wasn’t meant as a discourtesy as much as it was meant to comment on the lack of information in the query. We stand chastised and will post your comment beneath our original response. At least we didn’t use email shouts in our response which was actually meant to be funny. Occasionally a joke will fall flat. We hope our unintentional rudeness hasn’t cost us a reader. We still love the letter with the Pseudoscorpion in the cereal, and in actuality, we did identify it.

Evan Responds: (10/01/2005)
Sorry everyone took it as rude, I took it as funny, As in, where did you find it? I did not feal insulted or put down in any way. I guss I should of put LOL after I found it by the driveway , (LOL) But I also appreciate the concern of your readers, And I thank them too. The home is over 10 years old and it’s a modular home, And the wood is all treated lumber that we where using, so how it got there is beyond me, and your guess is probably better than mine (LOL) and there is about 100 acres of woods there . P.S. im not in to bugs much, but i do like to know what it is im looking at when i do see one I’ve never seen before and im glad I found your website, I now have it saved in my Fav. websites. and I thank you for your help.

Additonal Information
(09/30/2005) Evan Owens Ash Borer
Hello Bugman,
I’ve been appreciating your site for some time, since ID’ing a Great Golden Digger Wasp flying around hoarding Katydids in my wife’s flowers, and regularly click on it to see what’s up on your main page. Thanks for the work you’re doing. I’m just writing to shed a little light on a picture on your main page. I’m from northern lower Michigan and the boring worm that Evan Owens on 9/29/05 has pictured is an import that is giving the forest service around here fits. Since it is a newcomer to Evan, it is likely an Emerald Ash Borer grub, and it kills trees, specifically Ashes. Southeastern Michigan has had its parks and woods practically culled (an estimated 8 to 10 million trees since their introduction in 2002) of Ash trees over the past few years, and the insects are continually spreading as people move firewood (containing the voracious larva) to northern and western campsites in our state, Ohio, and Indiana. If Evan, or anyone else that spots them, is outside the known range of these pests, Michigan has a hotline for reporting their spread and disposal sites for infected wood (866-325-0023.) Michigan also quarantines areas and bans the transporting of firewood but the rules are all but unforcible. The best tool right now for stopping them is early detection and eradication, but that will only come with education. For further information, here are some very informative links that include pictures of the insect, where it came from, and efforts to contain it:
I know your site isn’t dedicated to removing pests, but this is one exotic that could use the boot.
Weston Tulloch
Bay City, MI

Thank you for your insiteful letter Weston. One comment we would like to add is that many Wood Boring Beetles have similar appearing grubs and this might actually be a native species. We also stand by this being a Cerambycid and not a Buprestid which the Emerald Ash Borer is. Cerambycid grubs have much larger heads.

2 thoughts on “Wood Boring Beetle Grub and subsequent Controversy”

  1. I thought the original response was funny! One should always include as much information as possible when it comes to species identification; where something is found can be as important, or even more important, than markings and behavior.


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