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

Subject: what is this insect
Location: ms
November 27, 2013 5:48 pm
Please help me
Signature: kasie dickerson

Stump Stabber

Stump Stabber

Dear kasie,
This Giant Ichnuemon in the genus
Megarhyssa is commonly called a Stump Stabber because of the method employed by the female when laying eggs.

Update:  April 8, 2014
We are frequently asked if Giant Ichneumons can sting, and we always reply that they cannot.  We just found a fascinating article.  According to Icheumon Wasps by Lloyd Eighme on Skagit.wsu:  “It might frighten you, but if you could watch it long enough you would be amazed at what it does. It lands on the bark of a tree and crawls up and down, tapping with its long antennae, obviously searching for something. Eventually it finds the spot it is looking for and begins to drill into the bark with its long needle-like ovipositor. It has detected the larva of a horntail wasp chewing its tunnel in the wood an inch or more below the surface of the bark. The ovipositor is made up of three stiff threads, hardened by minerals, that fit together with a groove in the center. Vibrating those sharppointed threads forces them into the bark and sapwood of the tree to contact the horntail grub in its tunnel. An egg is forced down the ovipositor to parasitize the grub. If the ichneumon parasite larva killed its host, they would both die, trapped in the solid wood which the parasite is unable to chew. It only feeds on the nonvital organs like the fat body until its host has nearly completed its life cycle and has chewed its way out near the surface of the bark. Then it kills and consumes its host grub and completes its own life cycle to emerge as another giant ichneumon wasp in the genus Megarhyssa (mega=large; rhyssa=tail) to start over again. You can see both Megarhyssa and its horntail wasp host in the MG collection.
People often ask if the ichneumon wasps will sting them with their needle-like ovipositors. The wasps are interested only in laying eggs in caterpillars or other insects, but if you handle a live one it may try to sting you in self-defense. Small ones could not likely penetrate your skin, but larger ones might be able to

What's That Bug? does not endorse extermination

Subject: What Is It?
Location: Goderich, Ontario, Canada
November 18, 2013 8:52 am
I found this little one on the side of the house. It was about 1 cm long.
Signature: Dale

Flightless Ichneumon:  Gelis species

Flightless Ichneumon: Gelis species

Dear Dale,
We were immediately excited upon viewing your photo.  We knew that though this looked like an ant, it is more likely a parasitic wasp and judging by the ovipositor, that the individual is female.  We quickly discovered the genus
Gelis on BugGuide where we found this matching photo.  According to BugGuide:  “Many species of Gelis are wingless. Habits are diverse. Many are external parasites of Lepidoptera in cocoons, others are parasitic on Symphyta, spiders, Diptera larvae and pupae, or wood-boring Coleoptera larvae. Many are Hyperparasites.”   This is news to us as we did not realize there were wingless Ichneumons.

What's That Bug? does not endorse extermination

Subject: black long legs big head beetle?
Location: Miami Florida
November 14, 2013 9:26 pm
Dear whats that bug,
I just found this visitor in our bathroom in the morning in November in Miami Florida.
Is not as beautiful as other bugs that i see in this website but I am just move by curiosity.
I could not found any picture online exactly as this guy . I think is a beetle
I took the pic with my cell phone and the animal was very high in the wall so i couldn’t get closer.
Thank you in advance
Signature: vlad

Ensign Wasp

Ensign Wasp

Dear Vlad,
This is an Ensign Wasp, and you should probably welcome it into your home.  The female Ensign Wasp parasitizes the ootheca or egg case of a Cockroach, and the developing Ensign Wasp larva feeds upon the eggs and developing Cockroaches, helping to control the population of an insect that very few people, even the most tolerant, will relish having in their homes.

Dear Daniel Marlos,
Thank you for your fast reply. I need to work in my id skills! Good that I leave it alone as I normally do with insects (with the exception of cockroaches).
Vlad

What's That Bug? does not endorse extermination

Subject: we didnt know what this was?
Location: Selby, North Yorkshire, England
November 12, 2013 10:49 am
we found it on a window in college on the 12 of November 2013 and we have no idea what this is,people were afraid because of the sting on it!! but i managed to get a close photo of it please get back soon
Signature: however you prefer

Ichneumon

Ichneumon

This is some species of Parasitic Hymenopteran, most likely an Ichneumon.

What's That Bug? does not endorse extermination

Subject: Help Please to Identify this lovely (wasp?) but
Location: Oklahoma City, OK
October 24, 2013 8:54 pm
Hi, yesterday I saw this little guy walking on my driveway and was intrigued with his colors. The shape generally reminds me of a wasp, but I could be miles wrong. His wings were black with a blue-ish/purple-ish sheen, and bright yellow antennae.
I hope the pic provides enough clues.
Signature: Brenda

Ichneumon:  Therion morio

Ichneumon: Therion morio

Dear Brenda,
This is a Parasitic Wasp known as an Ichneumon.  We are nearly certain it is
Therion morio, but that species generally has yellow legs.  See BugGuide for additional photos.

Thank you, Daniel. I’m shocked but very excited to get a response so quickly! I’ll check it out now.
Thanks,
Brenda

Hi again Brenda,
Our very small staff is only able to post a few of the numerous requests we receive daily.  We try to choose from interesting subject lines when we begin reading submissions, and then we post those that we believe would most interest our readership.  Underrepresented species on our site, unusual sightings, timely sightings, interesting letters and beautiful photographs are just some of the criteria we use to select letters to post.  Sadly, we do not have the time to read every letter and submission.  Perhaps when we retire from the work force we will have more time to devote to What’s That Bug? which started so small many years ago in the previous millenium, and which has grown to a difficult to manage size over the years.

What's That Bug? does not endorse extermination

Subject: Identifying Insect
Location: Cheltenham VIC
October 23, 2013 4:17 am
Hi,
I found two of these beautiful insects in my backyard the other day. I googled them and it looks like the Orchid Dupe Wasp.
I have a curious 2 year old and I’m concerned about the enormous stinger they have. Are they particularly dangerous and could there be a nest around?
Thanks in advance :)
Signature: Alex

Orchid Dupe Wasp

Orchid Dupe Wasp

Dear Alex,
Congratulations on identifying your Orchid Dupe Wasp,
Lissopimpla excelsa, a species of parasitic Ichneumon from Australia.  What you have identified as a stinger is the ovipositor of the female, and wasps that sting are using a modified ovipositor.  Some Ichneumons are capable of stinging.  We will try to locate some more specific information for you.

Great. Thank you so much for the quick response. I look forward to hearing more info if you come across any.
Cheers
Alex

What's That Bug? does not endorse extermination