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

Subject: Weird bug
Location: Denver
July 21, 2016 6:06 pm
Just in the ya4d collecting japanese beetles when we saw a very weird bug.
Signature: LouAnn

Therion morio

Therion morio

Dear LouAnn,
This amazing looking parasitoid Ichneumon,
Therion morio, does not have a common name. According to BugGuide:  “Host: moth larvae, including Hyphantria cunea (Fall Webworm).”  The female in your images is probably searching for caterpillars upon which to lay an egg so that her young can feed on the living caterpillar, eventually killing it.

Therion morio

Therion morio

What's That Bug? does not endorse extermination

Subject: Red mystery wasp
Location: near Ottawa, Ontario
July 18, 2016 3:43 pm
What is this beautiful little insect? I’m guessing some sort of wasp, maybe a parasitic wasp? I photographed it last week along Cedar Grove Nature Trail near Ottawa, where I see many fascinating tiny insects I can’t identify!
Signature: Suzanne

Ichneumon Stalks Caterpillar

Ichneumon Stalks Caterpillar

Dear Suzanne,
This is an amazing image.  We suspect that the Ichneumon Wasp, which you speculated correctly is a parasitoid, is stalking the Caterpillar.  Caterpillars are a common host to many species of Ichneumons.  Ichneumons are often very host specific, frequently limiting their prey to a single genus, or even a single species.  We are probably not even going to attempt to identify this Ichneumon beyond the family level as according to BugGuide, there are:  “About 5,000 described species in North America, possibly 3,000 more undescribed”  The caterpillar may be an Inchworm in the family Geometridae.

What's That Bug? does not endorse extermination

Subject: Giant Wood Wasp??? Or not
Location: Northern Ontario
July 16, 2016 11:44 am
Real curious about the attached bug.
Found it flying they an open wooded area.
Was thinking it might be a Giant Wood Wasp but the long (5-6″)tail made us think otherwise.
Signature: Regards, Teshaun

Stump Stabber

Stump Stabber

Dear Teshaun,
This is a Giant Ichnuemon, Megarhyssa atrata, commonly called a Stump Stabber, and anyone who has ever watched a female Stump Stabber laying eggs might be fooled into thinking it is a Wood Wasp.  Wood Wasps, including the Pigeon Horntail, oviposit or lay eggs on dead and dying trees and the larvae are wood borers.  The Stump Stabber is a parasitoid whose larvae feed on the larvae of Pigeon Horntails.

What's That Bug? does not endorse extermination

Subject: Unknown bug
Location: NorthWest Ontario
June 27, 2016 8:14 pm
This tree fell down in a recent storm and is known as a Manitoba Maple. This photo is taken of two of the several black yellow winged dragonfly scorpion like taled flyer. Behaviour of which is interesting and peculiar caught the eyes of many… They appeared to be mating or birthing or fertilizing… Hard to say if the tentacles at the end of their tales were their own or coming out…or if the green thick fluid like stuff was a placenta or mating fluids or ? Very bizarre as they seemed to be labouring if not pleasuring. One I thought was birthing actually burrowed it’s once widened tail tip into a hole in the bark made by termites….nestled it there and rested. A couple of these bugs looked rather fresh, young, and of the brighter yellow and reddish brown, one somewhat curled up and drying off …I wondered if was born recently. A couple of the bugs were blacker than others, almost all black and their tails so black you would hardly notice them in the shadows of the tree pieces or against the earth.
I live in northwestern Ontario bordering with Manitoba. We just had a lot of rain, 44mm this past weekend.
What is this bug
Signature: Curious C

Two Giant Ichneumons Oviposit

Two Giant Ichneumons Oviposit

Dear Curious C,
In your image, you have captured two different species of female Giant Ichneumons in the genus
Megarhyssa, sometimes called Stump Stabbers, and each is in the process of laying eggs or ovipositing.  Giant Ichneumons are parasitoid wasps and their host insects are the wood boring larvae of Wood Wasps in the subfamily Tremecinae, including the Pigeon Horntail, that feed on the wood of deciduous trees.  The smaller brown and yellow individual is Megarhyssa macrurus, and the larger, black and yellow individual is Megarhyssa atrata.

Wow! Very informative and fast ID’ing!! Thankyou so much!!:)
Curious C 😉

What's That Bug? does not endorse extermination

Subject: Mud Dauber?
Location: Eakin Park, Fairfax, Virginia
June 28, 2016 6:14 am
Hi – I photographed this wasp yesterday, and after a good bit of searching, the closest match I can find is the Black and Yellow Mud Dauber, except this wasp has yellow, not black antennae. (It was clinging to some grass, and seemed to not be doing well, as it was barely moving.) Perhaps you can help with the ID? Thanks!
Signature: Seth

Therion morio

Therion morio

Dear Seth,
This is a parasitoid Ichneumon Wasp,
Therion morio, and according to BugGuide, the host insect is:  “moth larvae, including Hyphantria cunea (Fall Webworm).”

What's That Bug? does not endorse extermination

Subject: Iridescent Green Insect – Maui
Location: https://en.wikipedia.org/wiki/Kealia_Pond_National_Wildlife_Refuge
June 27, 2016 10:53 am
Very active green insect in small groups on wood structures along the Kealia Pond boardwalk near Ma’alea, Maui, HI. Looks sort of like a cuckoo wasp but has enough differences to suggest some other species. Approximately 1″ (2.54cm) long. Active in daytime.
20.7963635,-156.4882661
Signature: T

Emerald Cockroach Wasp

Emerald Cockroach Wasp

Dear T,
This is an Emerald Cockroach Wasp,
Ampulex compressa.  They are fascinating insects that are able to sting a Cockroach and turn it into a Zombie that can be led back to a nesting site where the female lays an egg on the paralyzed Cockroach which provides living food for her young.  Read our well researched posting to which we have linked for more information on this incredible parasitoid.

What's That Bug? does not endorse extermination