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

Subject:  Striped Wasp-like bug & a fly/bee type bug
Geographic location of the bug:  Black Mtn Fire Lookout, SW Wyoming, USA
Date: 07/13/2019
Time: 01:23 PM EDT
Your letter to the bugman:  Please identify this wasp and fly-type bug. Hanging out at my Fire lookout.
How you want your letter signed:  Roger Lockwood

Wood Wasp

Dear Roger,
We will take your identification requests one at a time to give each insect its just due.  The wasp is a type of Horntail in the genus
Uroceros, most likely Urocerus flavicornis which is pictured on BugGuide.  We tried to determine the preferred host trees for this Wood Wasp, but we had to zoom out to the subfamily level on BugGuide to learn they feed “on conifers.”  We wanted more details to complete this posting, so we continued to research.  According to the US Forest Service, where the BugGuide provided taxonomic name is actually a subspecies Urocerus gigas flavicornis, they feed on “Fir, larch, spruce, pine, and Douglas-fir.”

What's That Bug? does not endorse extermination

Subject:  Is this a bee?
Geographic location of the bug:  CH43 9AJ
Date: 07/13/2019
Time: 03:28 PM EDT
Your letter to the bugman:  What is this? Is it a bee?
How you want your letter signed:  ??

Honeysuckle Sawfly

Dear ??,
We had no idea where CH43 9AJ is located, but a web search produced:  “
CH43 9AJ. Postal code in Birkenhead, England.”  This is a Sawfly, a non-stinging relative of Bees and Wasps.  Based on an image on NatureSpot, we are quite confident it is Zaraea fasciata, and the site states:  “Uncommon with most British records coming from England and Wales.”  According to UK Wildlife, it is commonly called the Honeysuckle Sawfly.

Honeysuckle Sawfly

What's That Bug? does not endorse extermination

Subject:  mystery hoverfly
Geographic location of the bug:  Mt St Helens, Washington, USA
Date: 07/11/2019
Time: 08:08 PM EDT
Your letter to the bugman:  Seen June 30, 2019. It’s with body was slightly over an inch (2.5-3 cm) long. Seen at Coldwater Lake, Mt St Helens National Volcanic Monument. A friend thought it might be a species of Tachinid Fly. I would be interested to know if anyone recognizes it.
How you want your letter signed:  Linda Severson

Sawfly: Trichiosoma triangulum

Dear Linda,
This is not a Hover Fly nor any other True Fly.  Flies have a single pair of wings and your insect has two pairs of wings.  The clubbed antennae characterizes it as a Sawfly, a non-stinging relative of stinging Bees and Wasps.  We believe we have identified it as
Trichiosoma triangulum thanks to images on BugGuide.  According to BugGuide:  “Larvae feed on leaves of alders (Alnus), ash (Fraxinus), poplars (Populus), willows (Salix), cherries (Prunus).”

What's That Bug? does not endorse extermination

Subject:  Caterpillar identification request
Geographic location of the bug:  Redmond, WA
Date: 06/28/2019
Time: 06:00 PM EDT
Your letter to the bugman:  Found this on a local street.Any idea what type of caterpillar this is? Thanks!
How you want your letter signed:  Don

Elm Sawfly larva

Dear Don,
Though it resembles a Caterpillar, the Elm Sawfly larva,
Cimbex americana, is actually a member of the insect order that includes Wasps and Bees.

Thank you so much! Really appreciate your knowledge!

What's That Bug? does not endorse extermination

Subject:  I am trying to care for this little friend and I have no idea what he is..
Geographic location of the bug:  New Hampshire
Date: 06/07/2019
Time: 08:25 PM EDT
Your letter to the bugman:  I thought he was an inchworm but.. when I Google ‘inchworm’, I cant find any like him. Please help, it would be super appreciated!!
How you want your letter signed:  Not sure what this means.. whichever way you’d like, I guess

Sawfly Larva

This is NOT an Inchworm, nor is it another species of Caterpillar.  This is the larva of a Sawfly, a non-stinging relative of Bees and Wasps.  It closely resembles the Roseslug, Endelomyia aethiops, pictured on Ecological Landscape Alliance where it states:  “During the months of May and June in the Northeast you may have noticed leaf discoloration in the form of blotches on your rose leaves (Figure 1). If you inspect the leaves closely you will see the culprit! It is a small, narrow bodied larva called the roseslug sawfly, an introduced pest from Europe. The larvae have pale green colored bodies and light tan-orange colored heads.”  Here is a BugGuide image.  The best way to care for this Sawfly larva is to feed it leaves from the plant upon which it was found.

Sawfly Larva

What's That Bug? does not endorse extermination

Subject:  Any ideas
Geographic location of the bug:  Western Washington
Date: 05/07/2019
Time: 07:49 AM EDT
Your letter to the bugman:  This bug was located by my daughter at her grandparents. I’ve never seen it and neither have they and they’ve lived there for 18 plus years. We became very curious to what it may be but can’t find it through our research.
How you want your letter signed:  Curious Father

Elm Sawfly

Dear Curious Father,
This is an Elm Sawfly, a non-stinging member of the Order Hymenoptera, a group that includes Bees and Wasps.  According to the University of Wisconsin-Madison Master Gardener Program:  “The adults of sawflies tend to be inconspicuous, and look somewhat like wasps, but do not sting. They feed on pollen and nectar, so may be seen on flowers as well as their larval host plants. They are not very active, making only short flights in sunny weather, and resting on leaves otherwise. Many sawfly species are parthenogenetic; since they do not need to mate to reproduce, males are very rare even in species where males are known to occur.”

Thank you so much for the reply. My daughter will be excited to learn what she found. You rock.

What's That Bug? does not endorse extermination