Currently viewing the category: "Parasitic Hymenopterans"
What's That Bug? does not endorse extermination

Subject: crane fly or ichneumon wasp or something else entirely?
Location: Dover, PA
May 27, 2017 5:25 am
Hi – a friend of mine asked me what this is. He said it was ‘bigger than a normal wasp’. Thank you !!!
Signature: Sue

Stump Stabber

Dear Sue,
This is indeed a Giant Ichneumon, probably
Megarhyssa macrurus, and Giant Ichneumons are frequently called Stump Stabbers because the female uses her very long ovipositor to lay eggs in dead and dying wood that is infested with wood boring larvae of the Pigeon Horntail, a species upon which the Stump Stabbers prey.

Thank you so much !
Sue

What's That Bug? does not endorse extermination

Subject: Is this a wasp of some kind
Location: Frontierland Clearwater, KS
May 13, 2017 9:52 pm
Hey, Bugman, our Boy Scout Troop was at Frontierland camp in Clearwater, KS today and we saw this bug and no one knew what it was. We’re hoping you can tell us. Thank you so much!!
Signature: KarenLuce

Stump Stabber

Dear Karen,
Members of the Giant Ichneumon genus
Megarhyssa are frequently called Stump Stabbers because the female uses her incredibly long ovipositor to lay her eggs in the wood boring larvae of Pigeon Horntails.  Your individual is Megarhyssa macrurus, but we believe the scouts are more likely to remember that they saw a Stump Stabber.

What's That Bug? does not endorse extermination

Subject: This bug hurt me. What is it?
Location: Central Kansas (Valley Center, Kansas)
April 16, 2017 8:52 pm
I let my dogs in around 9:45 pm and in came two of these bugs. One stung me, I actually screamed because it hurt. An hour later it still hurts. I need to know what this bug is or my 10 yr old will never go outside again. I live near a pond and I am in Valley Center, Kansas this is located in the central part of the state. 4-16-2017
Signature: C.Waller

Short-Tailed Ichneumon

Dear C. Waller,
This is a Short-Tailed Ichneumon in the subfamily Ophioninae, a parasitoid wasp that we believe is to blame for many reports we receive of stinging Crane Flies.  Short-Tailed Ichneumons are attracted to lights, and that might be the reason they entered your home at 9:45 PM.  Though painful, the sting is not considered dangerous.  You might have to rethink restricting the activities of your ten-year old since BugGuide data has the range of Ophioninae as most of North America, with only four states providing no reports:  Montana, Wyoming and the Dakotas.  That does not mean they do not exist there, merely that there have been no BugGuide sightings.

Sting of a Short-Tailed Ichneumon

What's That Bug? does not endorse extermination

Subject: Insect information
Location: Baja California
March 30, 2017 9:44 pm
Found this in sanfelipe Baja mexico, after I woke up with a bite on my are that swelled quickly. Wondering if it could be the cause.
Signature: Josh gordon

Ichneumon

Dear Josh,
If this is the culprit, you were stung and not bitten.  This looks like a Short-Tailed Ichneumon, possibly in the genus
Ophion.  Most Ichneumons are harmless, but members of the genus Ophion are capable of stinging.  According to BugGuide:  “Adult Ophion species will hunt for their host caterpillar. Usually one egg is laid per host. Caterpillar usually dies during pupal stage though wasp larva remains to pupate itself.”

What's That Bug? does not endorse extermination

Subject: Wasp mimic?
Location: Columbus, OH
March 27, 2017 7:41 am
Hello! This insect landed on me and I cannot for the life of me figure out what it is (my best guess is some sort of sawfly). This picture was taken on March 25th in central Ohio in an urban enviornment–I was actually about to get in my car when it was spotted. The weather was sunny and in the 70’s. I am especially perplexed by the super long antenna and the fact that the colored bands on the abdomen do not wrap all the way around. Thanks!
Signature: Intrigued

Ichneumon we believe

Dear Intrigued,
We are posting prior to doing any research as we are rushed right now, but we believe this is an Ichneumon, a member of a very large family of Parasitic Wasps, that are often recognized by long antennae.  Here is a similar looking Ichneumon in the genus
Banchus from BugGuide.

Ichneumon


What's That Bug? does not endorse extermination

Subject: What is this bug?
Location: Hatfield Forest UK
February 19, 2017 9:56 am
Good evening
We saw these bugs under tree bark of felled tree in Hatfield forest.
Do you know what it is please?
Thank you
Signature: Claire

Ichneumons

Dear Claire,
Though your image lacks critical detail, we are relatively confident these are parasitoid Ichneumon Wasps.  Some species feed on wood boring insects, which may explain their presence under the bark of a felled tree.  This images from Nature Spot of
Achaius oratorius look similar.  Ichneumon stramentor, also on Nature Spot, looks like an even better match.  According to Nature Spot:  ” The larva parasitise the Large Yellow Underwing and Setaceous Hebrew Character moth caterpillars (possibly others), the adult wasp lays its eggs inside the caterpillar, the developing larva then eats it from the inside.”  You can also find some interesting information on Paul’s Back Garden Safari.

Ichneumon

 

What's That Bug? does not endorse extermination