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

Subject: Dangerous bug or not?
Location: Rhode Island
July 17, 2013 3:24 pm
Dear Bugman,
I have this insect that looks like a type of wasp that has been hanging around my daughter’s swing set. We built a wooden frame and placed wood chips/mulch in it for the swing set area. The insect wasn’t aggressive and it let me take some close up pictures with my cell phone. I just want to make sure it is safe since it is spending a large amount of time around her swing set. I tried googling images and didn’t realize there are SO many types of wasps. Could you please help?
Signature: Sincerely,

Mydas Fly

Mydas Fly

Though it effectively mimics a stinging wasp, this is actually a harmless Mydas Fly.

What's That Bug? does not endorse extermination

Subject: What is this beautiful guy?
Location: Columbus, OH
July 3, 2013 8:44 pm
Saw him on our burning bush out front. Didn’t want to get too close. Guessing a solitary wasp/fly of some kind? Thanks for any help!
Signature: Thanks, Nick

Mydas Fly

Mydas Fly

Dear Nick,
The Mydas Fly,
Mydas clavatus, that you submitted is a very effective wasp mimic, but we are not entirely certain of the connectivity of this species to other orders in the Complex Web of Life.

What's That Bug? does not endorse extermination

Subject: Digger wasp variant?
Location: Philadelphia, PA suburbs
July 3, 2012 1:20 pm
Hello, I noticed this wasp the other day and was struck by its appearance, as I do not usually see wasps this large except for the occasional cicada killer. I researched it online and as close as I could tell it was a digger wasp, specifically sphex nudus. However, in all the photos I have seen none have the orange antennae like the one in my picture. The wasp was also over an inch long.
Signature: Aaron Trzeciak

Mydas Fly

Hi Aaron,
This is a fly, not a wasp, and it is very easy to mistake a large Mydas Fly for a wasp.  We just posted a photo of another species of Mydas Fly, and your individual is
Mydas tibialis which we identified on BugGuide.

What's That Bug? does not endorse extermination

Subject: Blue winged insect
Location: Niagara area, Southern Ontario
July 3, 2012 1:11 pm
I live in the Niagara area of Southern Ontario and found this guy in my garden. It is just over an inch long and the wing is almost 3/4 of an inch. Any idea what it is?
Signature: P.Skinner

Mydas Fly

Dear P. Skinner,
The wings of this Mydas Fly are reflecting the beautiful color of the sky.  The wings are not actually that blue, but the dark surface is perfect for enhancing the saturation of the colors reflected in them.

Thank you so much for identifying this guy for me. I have never seen one before and he was beautiful. Thanks also for featuring him as ‘bug of the month’. Very cool.

What's That Bug? does not endorse extermination

Subject: What is this insect?
Location: Oxford, NC
June 22, 2012 12:50 pm
Hi,
I am hoping you can help me identify this insect. I don’t think I have ever seen these before. It looks similar to a peach tree borer moth, but I don’t think their behavior makes sense if that is what they are. I have been watching several of these flying around an area where I have spreading chipped wood mulch. They appear to be laying eggs in the mulch, and there are no peach trees around at all. Thanks for any help.
Signature: Dan

Mydas Fly

Hi Dan,
It is interesting that you have compared this Mydas Fly to a Peach Tree Borer because both insects are wasp mimics.  According to BugGuide:  “Eggs are laid singly in soil or rotting wood. (See video of oviposition–Flickr). Mydas larvae prey on beetle larvae, esp. those of June beetles. Larvae pupate close to soil (or wood?) surface. Adults are active only in mid-summer.”

Thanks very much!  That is definitely it.  I hope they also prey on Japanese beetles.

What's That Bug? does not endorse extermination

mydas vs. hornet
Location: Northern Indiana
August 25, 2011 10:21 am
This is not an ID request, but thought that other WTB addicts might appreciate it. This picture is not great quality, but here’s a link to the full video of a hornet attacking and decapitating a golden-legged mydas fly:
http://www.facebook.com/rumvillage#!/video/video.php?v=207796845940579&oid=116718851680137&comments
Signature: Vince

Bald Faced Hornet decapitates Gold Legged Mydas Fly

Hi Vince,
We were unsuccessful in locating a Golden Legged Mydas Fly online, but we did find
Mydas tibialis on BugGuide.  It is a species with no common name listed and it has been reported from Indiana.  Your Food Chain image is wonderful.  We wonder if the best Hornet hunters decapitate large and dangerous prey like Dragonflies, and then they communicate to the hive where to find the kill.

What's That Bug? does not endorse extermination