Currently viewing the category: "Horntails, Wood Wasps and Sawflies"
What's That Bug? does not endorse extermination

Subject: Midas like bug
Location: NW Washington state
May 17, 2016 8:45 pm
Hi, We have an odd bug we’ve never seen. It was seen today 30 miles south of Canada/ US border in Western Washington.
It’s about 1 and 1/4 inches long.
Primarily black with striped legs and long cream antenna.
It was attracted to a newly washed black car.
Signature: Claudia

Wood Wasp

Wood Wasp

Dear Claudia,
This is a female Wood Wasp,
Urocerus albicornis, a species that does not sting.  According to BugGuide:  “hosts include fir, larch, spruce, pine, Douglas-fir, hemlock, and western red cedar.”

What's That Bug? does not endorse extermination

Subject: Black and yellow
Location: East Sussex, UK
May 1, 2016 3:35 pm
Spotted in my garden on April 30th…unfortunately dead.
The lighter patch on the body is in fact bright yellow but the photo is not that well lit.
Signature: Sue W

Birch Sawfly

Birch Sawfly

Dear Sue,
Your Sawfly reminds us so much of the North American Elm Sawfly that we searched for members of the genus in the UK.  We quickly found the Birch Sawfly,
Cimbex femoratus, on NatureSpot where it is described as “Up to 25mm long, the largest British Sawfly. The adult is easily recognised by the pale band on its shiny black abdomen. Wings are smoky brown colour with dark brown margins. The antennae are yellow tipped.”  The site also states:  “Local throughout Britain, not very common” and “Uncommon in Leicestershire and Rutland.”  There is a very nice image on Wild About Britain.  Sawflies are solitary, non-stinging relatives of Ants, Bees and Wasps.

Thank you very much Daniel.
Greatly appreciate your swift response.
All the best
Sue

What's That Bug? does not endorse extermination

Subject: scary, shiny black insect with yellow antennae
Location: Fayette County, Illinois
April 25, 2016 11:47 am
I came across this scary looking, very shiny dark blue/black insect with yellow legs and antennae while mushroom hunting in April. I had my camera ready and he was very cooperative, although afterwards I realized I probably shouldn’t have been so close. I have tried to google his description but I can’t find anything that looks exactly like him. I’m very curious. Any help would be appreciated!
Signature: Jilla Young

Sawfly

Sawfly

Dear Jilla,
This is an Elm Sawfly, and it appears to be on an elm twig.  The Elm Sawfly,
Cimbex americana, is the largest North American Sawfly.  Though it is related to stinging bees and wasps, it is incapable of stinging, so though it appears formidable, it is actually quite harmless.

What's That Bug? does not endorse extermination

Subject: Need help with ID
Location: Flower Mound, TX
April 9, 2016 8:01 pm
I saw this today on my back patio. I tried searching the internet, but I can’t find anything to definitively identify. Its behavior was odd … pincers opening and closing, legs moving in and out, abdomen raising and lowering. It also ended up on its back shortly after the pics were taken still performing the sane actions.
Signature: Kari

Elm Sawfly

Elm Sawfly

Dear Kari,
This is an Elm Sawfly,
Cimbex americana, a non-stinging relative of bees and wasps.  There is some variability in the coloration, but this BugGuide image is a good color match to your individual.  We don’t know what caused the unusual behavior that occurred just before death, perhaps it was just the death throes. 

Elm Sawfly

Elm Sawfly

What's That Bug? does not endorse extermination

Subject: Spiderwasp, spiderwasp, does whatever a spiderwasp does…
Location: Cincinnati, oh
April 2, 2016 2:31 pm
Saw this painting a sign atop a 3 story buidling, it was huge… non aggressive, just kinda walking around. Don’t know if it really is a spider wasp, but from what I looked into, says it might be…
Signature: E. Hutchins

Pigeon Horntail Ovipositing

Pigeon Horntail Ovipositing

Dear E. Hutchins,
This is NOT a Spider Wasp.  It is a female Pigeon Horntail, a species of Wood Wasp, and she is in the process of ovipositing or laying eggs.

What's That Bug? does not endorse extermination

Subject: Caterpillar
Location: Athens, GA
March 27, 2016 9:46 am
Please help!
This guy fell on the windshield my car (I did not notice) and rode with me some distance. What is it? If I cannot find its host plant soon, I don’t know what I can do for it. I have tried feeding it a variety of plants to no avail. It is super tiny and very hard to get a good picture. I hope these pictures can assist!
Signature: Rachel

Sawfly Larva

Sawfly Larva

Dear Rachel,
Though it resembles a Caterpillar, your insect is actually a Sawfly Larva, a relative of wasps and bees from the order Hymenoptera.  According to About Education:  “Caterpillars are the larvae of butterflies and moths, which belong to the order Lepidoptera. Sawfly larvae look similar to caterpillars, but are an entirely different kind of insect. Sawflies are related to bees and wasps, and belong to the order Hymenoptera. Like caterpillars, sawfly larvae usually feed on plant foliage.  How can you tell the difference between a sawfly larva and a caterpillar? Count the prolegs. Caterpillars may have up to five pairs of abdominal prolegs (see parts of a caterpillar diagram), but never have more than five pairs. Sawfly larvae will have six or more pairs of abdominal prolegs*. …  There are, of course, exceptions to every rule. Caterpillars of the family Megalopygidae, the flannel moths, are unusual in having 7 pairs of prolegs (2 more pairs than any other Lepidopteran larvae). ”  Your individual appears to have at least seven pairs of pro-legs.  Based on this BugGuide image, we believe your individual may be a Raspberry Sawfly,
Monophadnoides rubi.  If that is the case, according to BugGuide, you should try feeding it rose leaves if you cannot locate raspberry leaves.

Sawfly Larva

Sawfly Larva

Thank you so much for this information! This is so helpful. I had no idea! Wow.
We tried a blackberry leaf earlier. I will go find some rose leaves.
Thank you! Thank you!
Rachel

What's That Bug? does not endorse extermination