Currently viewing the category: "Horntails, Wood Wasps and Sawflies"
What's That Bug? does not endorse extermination

Subject: Giant wasp…borrows in tree giving birth? WTB?
Location: West Chester, Pennsylvania
September 4, 2015 4:22 am
I live in West Chester, Pa, and took these photos on September 3rd, 2015. They were taken in my backyard, on a dead tree…that I am in process of removing. I noticed this very large wasp looking insect, it was 2inches I length….I know because I measured it. It was near the base of the tree and looked like it was searching for something. I watched as it found a location and a long black “leg” like thing injected itself into the tree bark . I know it was not a leg because all of the insects legs were yellow and this was black, thinner and was being pushed into the tree. The insect started moving its body back and forth and the black “leg” got shorter and shorter until it was almost not even seen. It stayed there for at least a half an hour and when I came back out side it had moved itself to another part of the tree and was doing the whole process over again. Now, I am assuming it was putting its eggs into the tree bark. I love insects and ha ve never seen a bug this long, or a stinger this long, could you tell me what bug this is? Thanks for your time and your help!
Signature: J Hartz

Pigeon Horntail Ovipositing

Pigeon Horntail Ovipositing

Dear J Hartz,
Thanks so much for submitting your excellent images and detailed account of this Pigeon Horntail,
Tremex columba, in the act of ovipositing.  Your speculation is quite accurate.  Pigeon Horntails are Wood Wasps whose larvae tunnel in and feed on dead wood of deciduous trees.

PIgeon Horntail Ovipositing

PIgeon Horntail Ovipositing

Thanks so much for the information! I love looking at all types of insects and studying their life cycle.   You have a great websites and it is very helpful, keep up the great work!
Sincerely-
J Hartz

PIgeon Horntail Ovipositing

PIgeon Horntail Ovipositing

What's That Bug? does not endorse extermination

Subject: orange dog wasp
Location: courtice arena, ontario canada
September 1, 2015 5:49 pm
sorry lost my last submission trying again. Found this orange looking wasp that has a puppy face. search but could not find any identification on this guy. Was really lucky he sat still and posed for me. sept 1/2015 around 6;30 pm in an open field .
Thanks
Signature: Terri Martin

Male Pigeon Horntail

Male Pigeon Horntail

Dear Terri,
Though we have no shortage of images of Pigeon Horntails on our site, male specimens like your individual are at a premium.  Almost all the images of Pigeon Horntails on our site are females, and we even have a good number of ovipositing Pigeon Horntails.  These Wood Wasps are known scientifically as
Tremex columba, the sole food eaten by larval Stump Stabbers, Megarhyssa atrata.  The female Stump Stabber has a much longer ovipositor than the female Pigeon Horntail because unlike her prey, she must lay her egg with incredible precision so the hatchling can locate its host.  Here is a BugGuide image of a male Pigeon Horntail.  By the way, your images are gorgeous.

Male Pigeon Horntail

Male Pigeon Horntail

Thanks Daniel.  Hoping one day to find an insect that no one can identify then I can name it.

Pigeon Horntail

Pigeon Horntail

What's That Bug? does not endorse extermination

Subject: Giant wasp
Location: Middle of, Ontario canada
August 24, 2015 10:16 am
Can you identify this bug?
Signature: I dont know what this means

Pigeon Horntail

Pigeon Horntail

This is a Pigeon Horntail, a species of Wood Wasp.  The female uses her ovipositor to lay eggs beneath the bark of unhealthy trees.  Pigeon Horntails do not sting.

What's That Bug? does not endorse extermination

Subject: Possible stink bug eating red caterpillar
Location: Livingston County, MI
August 22, 2015 8:26 pm
Found this hanging off a leaf in a meadow behind my house. I think the bug is some sort of stinkbug but I have not been able to find a match online. No idea on the caterpillar type.
Signature: Cheryl E.

Predatory Stink Bug Nymph eats Sawfly Larva

Predatory Stink Bug Nymph eats Sawfly Larva

Dear Cheryl,
This is a Predatory Stink Bug nymph, possibly in the genus
Apoecilus based on this BugGuide image, but it is not feeding on a caterpillar.  The prey is a Sawfly larva in the family Argidae, and we have a visual match to Arge coccinea thanks to this BugGuide image.

What's That Bug? does not endorse extermination

Subject: What is this????
Location: Newfoundland, Canada
August 17, 2015 10:37 am
hi there, just saw this and was wondering what it is?? it has me freaked out!!!!
Signature: Denise

Horntail

Horntail

Dear Denise,
This is a Horntail or Wood Wasp in the genus
Urocerus, most likely Urocerus albicornis.  They do not sting.  The female uses her ovipositor to lay her eggs beneath the bark of conifers.  According to BugGuide:  “hosts include fir, larch, spruce, pine, Douglas-fir, hemlock, and western red cedar.”

What's That Bug? does not endorse extermination

Subject: Caterpillar
Location: Minnesota
August 12, 2015 1:34 pm
Dear bugman,
I found a caterpillar at my lake cabin in Minnesota. I would like to know what kind it is, will it turn in a moth, etc.
Signature: from cassie

Sawfly Larva

Sawfly Larva

Dear Cassie,
We lightened up your lateral view and we conclude this is not a Caterpillar.  There are ten legs visible, three true legs and seven prolegs, and because insects have bilateral symmetry, we can deduce that there are seven pairs of prolegs.  Most caterpillars have five pairs of prolegs, though caterpillars from the Inchworm family Geometridae have but two pairs of prolegs.  This is the larva of a Sawfly, and though it really resembles members of the genus Cimbex, including the Elm Sawfly, we have never seen such coloration that we can recall.  Perhaps one of our readers will recognize this Sawfly.

Unknown Sawfly Larva

Unknown Sawfly Larva

Ed. Note:  August 15, 2015
We finally located an image of an Elm Sawfly Larva on BugGuide with similar coloration, and it is also from Minnesota.

What's That Bug? does not endorse extermination