Category Archives: Horntails, Wood Wasps and Sawflies   rss

Great Wood Wasp from UK

whats my bug ?
Location:  UK Cambridgeshire
July 20, 2010 8:49 am
Found trying to crawl out of a dry flower pot today ( 20th July )Conditions dry.
Mike

wood wasp uk mike5 300x188 Great Wood Wasp from UK

Great Wood Wasp

Hi Mike,
This is a Great Wood Wasp,
Urocerus gigas, and it is sometimes called a Horntail.  The “horn” is the ovipositor of the female.  You can read more about this species on the UK Safari website.

What's That Bug? does not endorse extermination

Large Rose Sawfly

Yellow Fly
June 12, 2010
Hi, I have found half a dozen of these bright yellow flies on my rose bush. They are just sitting upside down on the stems. The fly is about 1/2 inch long. I have never seen this fly before do you have any ideas? I live in East Anglia in England and it is a lovely summers day. I hope the pics are good enough for you to identify! By the way I love your site. icon smile Large Rose Sawfly
Tanya
England

large rose sawfly uk tanya 300x193 Large Rose Sawfly

Large Rose Sawfly

Hi Tanya,
This was a very easy ID for us, because last week we received a photo of the same species from UK.  We knew it was a Sawfly, but we were not sure of the species.  Once we provided the querant, Richard Avery, with that information, he wrote back with a species identification of Arge pagana, the Large Rose Sawfly.

Hi Daniel,
Thank you very much for your reply and link to Richard’s query.  I hope they wont cause too much damage to my roses!
Many thanks
Tanya

Large Rose Sawflies from UK

A fly of about 1 cm. Bright yellow abdomen, brownish clear wings, slightly back curving antenae
June 5, 2010
On a rose bush in southern UK. A warm day, no wind. stayed on bush al day, gone at sundown – all three, see images
Richard Avery
Salisbury, Southern UK

sawflies uk richard 300x206 Large Rose Sawflies from UK

Large Rose Sawflies

Hi Richard,
These are actually Sawflies, nonstinging relatives of wasps whose larvae often resemble caterpillars and when numerous, they are capable of defoliating trees and shrubs.  We don’t recognize this species and we will do some research to properly identify it.  The Bugs and Weeds website does not picture this species.

sawfly uk richard 266x300 Large Rose Sawflies from UK

Large Rose Sawfly

Daniel, Whoa, that was quick. I’ll wait for your species id. Thanks.
Richard

Daniel,
Now you have given me the heads up on sawflies I have investigated further and discovered it is ‘Arge pagana’ , the Large Rose Sawfly. Seeing the speckled larvae was an ‘Oh, right!!’ moment as I had seen them many times on my roses and never got around to identifying them.
Many thanks for your prompt and accurate info, guys like you make life so good!
regards from the UK
Richard

Hi again Richard,
We are glad we could help.  Thanks so much for writing back with the species name Arge pagana for the Large Rose Sawfly.  The Garden Safari website has excellent information on the Large Rose Sawfly.

What's That Bug? does not endorse extermination

False Pine Webworm

Infesting my mugo pine
April 23, 2010
April, 23, 2010 – I live in Toronto, ON Last week I notice bunch of flying bugs in my mugo pine, after careful examination I realised that they were all over the mugo. They like to get right into the pine needles and escially where the new candles are growing. When they fly the wings make a buzzing sound, they can be easily swatted away. I don’t want to lose my pine and was wondering how I could enticed them to move. I did my best with the attached picture it shows both the red-headed one and the black one. You insight is greatly appreciated.
TD in Toronto
Toronto, Ontario Canada

false pine webworm toronto 300x200 False Pine Webworm

False Pine Webworm

Dear TD,
We thought your insect resembled a Sawfly, so we searched through BugGuide and quickly found the False Pine Webworm, Acantholyda erythrocephala.  The female has a reddish orange head and the male is black with a yellow face, a sexual dimorphism that is clearly represented on your photograph.  BugGuide also indicates it is a:  “Serious problem on white pine along east coast of U.S. Also in Ont, Alberta and Newfoundland. Introduced from Europe in 1925.
“  Though they are not mating, we are going to tag your image as Bug Love nonetheless.

Elm Sawfly

hairless bumble bee?
April 18, 2010
Dear Bugman,
I have been collecting insects for about 9 years. I have been able to identify all of them except for this one. I found it on a log , and when I went to catch it, it did not try to fly away.
Aaron
Sullivan county, Pa

elm sawfly aaron 300x249 Elm Sawfly

Elm Sawfly

Hi Aaron,
You have been having difficulty with your identification because this is not a Bumble Bee.  It is an Elm Sawfly, Cimbex americana, the largest North American Sawfly.

Sawfly Larva, we think, from India

Red-chilli like larva
February 28, 2010
The person who took this photo thinks it is a beetle larva.
Suhas
West Bengal, India

red larva india suhas 300x214 Sawfly Larva, we think, from India

Sawfly Larva, we believe

Dear Suhas,
There are not enough anatomical features visible in this photo for us to conclusively categorize this larva.  We don’t believe it is a caterpillar or a beetle grub.  We tend to favor it being a Sawfly Larva.  Sawflies are related to bees and wasps, and many species have larvae that resemble caterpillars.  Perhaps one of our readers will be able to assist in a species identification.

Dear Daniel
Thanks a lot for your prompt reply. I will certainly gather more details from the photographer and send it to you soon.
regards
Suhas

1

Pigeon Horntail

What’s That Bug?
February 28, 2010
Found this on the side of the house approximately 2 inches in length was using the long protrusion from it’s rear to poke into the little holes of the brick. Notice the stinger on it’s rear also.
KG
Defiance, Ohio

pigeon horntail kg 300x215 Pigeon Horntail

Pigeon Horntail

Dear KG,
This is a Pigeon Horntail, a type of Wood Wasp, and its behavior is highly unusual.  The protrusion is the female’s ovipositor, and she uses it to deposit eggs beneath the bark of diseased, dead or cut wood, so there is no real reason for her to be poking around your bricks.  Even more unusual is finding her in the dead of winter when there is considerable snow on the ground in Defiance, Ohio.

Ahhhh thank you very much sir, i took this photo last summer was just looking through my pics and wondered if there was a site that could tell me what this was (good name for your site btw) : ) I have a photo of another bug with a long nose i don’t know what it is, if you’re interested if not i won’t bug you. : )

Sawfly Larva: What does more damage? A Sawfly Larva eating Leaves or a Crew Cutting Branches???

Found this larva in gunni euc tree need id?
February 23, 2010
While cutting gunni euc one of my workers found this worm. I need it id to know if I it is harmful. It is white had has black spots on the side. The face almost looks like it is smiling. Please help!!
Jennifer
Watsonville ca

sawfly larva jennifer 300x224 Sawfly Larva:  What does more damage?  A Sawfly Larva eating Leaves or a Crew Cutting Branches???

Sawfly Larva

Hi Jennifer,
This is the larva of a Cimbicid Sawfly, a non-stinging relative of wasps and bees.  The Sawfly larva will eat some leaves, and we believe it is doing far less harm to the plant than the workers who were probably cutting branches.



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