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

Subject: New Bug
Location: South Florida, USA
July 22, 2017 1:53 pm
Hi,
I live in Miami Florida and have lived in my current house for six years. In the last two months I have started to see this type of bug dead around my house. Probably about ten of them in various places dead on the floor. Yesterday I saw what I thought was a dead one and when I went to push it aside to pick up later it started running around very quickly, not flying. Upon closer look it has wings which I was very surprised about. I haven’t seen it fly, just dead ones and this one running. It is summer here and I do not have pets. What is it please, thank you!
Signature: Marc

Ensign Wasp

Dear Marc,
This is a beneficial Ensign Wasp.  They are parasitoids that lay eggs on the ootheca or egg cases of Cockroaches, helping to control Cockroach populations.  If you are finding them dead, we suspect some pesticide is being used in your home to control unwanted insect populations.

What's That Bug? does not endorse extermination

Subject: Strange Dragonfly
Location: Macdonald Township, Echo Bay, ON Canada
July 21, 2017 12:37 pm
This little fella looks sort of like a Dragonfly of some kind. I’ve never seen one quite like this though, has me curious. Any thoughts?
Signature: -Mick

Stump Stabber

Dear Mick,
This is NOT a Dragonfly.  This is a female Giant Ichneumon,
Megarhyssa atrata, commonly called a Stump Stabber, and she is in the act of laying eggs.

Thanks so much for the speedy reply, been in the maple bush a lot of years and myself or my father have never seen these little gaffers.
-Mick

What's That Bug? does not endorse extermination

Subject: Creepy bug
Location: New Jersey Pine Barrens
July 16, 2017 4:12 pm
I found this bug in the shower stalls at my camp and it didn’t bother me, but I have not been able to identify it and would really like to know what it is. I found it in the summer in the New Jersey Pine Barrens.
Signature: Cate

Ichneumon

Dear Cate,
We believe we have correctly identified your parasitoid Ichneumon as
Xorides stigmapterus thanks to this BugGuide image.  According to BugGuide of the genus:  “hosts: wood-boring beetles, especially Buprestidae and Cerambycidae.”

What's That Bug? does not endorse extermination

Subject: Is this a Giant Ichneumon?
Location: Tampa, Florida, USA
July 12, 2017 5:52 pm
I took this picture when I saw a strange bug during my lunch break today in Tampa, FL. I have never seen anything like it but Google images of giant ichneumons seem to look like it. It’s on a large column in front of the office building and is probably about four to six inches long including the very long tail.
Signature: Curiously, Paul

Crown of Thorns Wasp

Dear Paul,
Like the Giant Ichneumon, this Crown of Thorns Wasp is a parasitoid, but they are not closely related.  Here is an image from BugGuide.  According to BugGuide:  “Reported to have two morphs, previously described as subspecies: ‘one with head and pronotum ferrugineous (
M. b. bicolor) and another uniformly brown or blackish (M. b. sickmanni)’ (Stephanid home page–Alexandre Pires Aguiar)” which means your color morph was once classified as Megischus bicolor bicolor.

Hi Daniel,
Thank you for taking the time and effort to identify that bug! The Crown of Thorns Wasp is definitely what I saw. I shared the information and the link with my coworkers 🙂
Hope you have a wonderful day!
Best,
Paul
What's That Bug? does not endorse extermination

Subject: assassin? wasp?
Location: Bethesda, MD
July 13, 2017 7:22 am
Found this on my potted hosta in Bethesda Maryland, July 2017.
I took the photos myself.
I’m downloading a couple of images, but the edited images at this link to my blog are much better:
http://www.margaretsoltan.com/?p=55558
Signature: Margaret Soltan

Braconid Wasp

Dear Margaret,
This beautiful creature is a parasitoid Braconid Wasp, and we believe it is
Atanycoius longicauda based on this BugGuide image.  BugGuide states of the genus:  “Parasites of woodboring beetle larvae, especially metallic wood-boring beetles (Buprestidae) and longhorn beetles (Cerambycidae).”

Braconid Wasp

Daniel:  Thank you!  I appreciate the identification (I’ve spent fruitless hours looking at images), and I really appreciate the quick reply.   And I’m glad you agree it’s beautiful.
All best, Margaret

What's That Bug? does not endorse extermination

Subject: What is this pretty bug?
Location: Toronto, Ontario
July 9, 2017 4:43 pm
I found this pretty bug flying around my bush and I don’t recall ever seeing one before. It’s purplish wings were really pretty in the sunlight. Could you please identify it for me?
Signature: Caitlin

Ichneumon: Trogus pennator

Dear Caitlin,
The long antennae on this magnificent wasp caused us to correctly speculate it must be an Ichneumon, and we quickly identified it on BugGuide as
Trogus pennator.  According to BugGuide:  “Trogus pennator is a parasitoid of swallowtail butterflies (Papilionidae), ovipositing in the caterpillars.  The solitary larva develops inside the caterpillar, allowing it to pupate before killing it. After metamorphosing, the adult wasp chews an irregular hole in the chrysalis to escape.”

Ichneumon: Trogus pennator

What's That Bug? does not endorse extermination