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
Location: Fayette County, Illinois

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