Mydas Fly

Large black flying insect
Location:  Northern Indiana
August 1, 2010 4:23 pm
Today I found this insect dying in my yard in northern Indiana. Ants were busy foraging on it. I could only see one pair of wings. I’ve never seen anything like this one before!

Mydas Fly

Hi Nick,
This is a species of Mydas Fly,
Mydas tibialis, which we identified by matching your image to photos posted to BugGuide.  According to our Audubon Society Guide to North American Insects and Spiders:  “Only a few species of mydas flies occur in North America.  … The adults are predatory and closely resemble wasps and robber flies.”

Photo of author


BugMan aka Daniel Marlos has been identifying bugs since 1999. is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

1 thought on “Mydas Fly”

  1. Found a mydas tibialis a few years ago and had a difficult time IDying it also. I was told that there aren’t many known populations of this insect in the midwest. I’m a naturalist at Rum Village park in South Bend, IN, (northern IN). Where in Northern IN are you, Nick? I noticed that another mydas tibialis photo was also posted from northern IN.



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