What's That Bug? does not endorse extermination

Subject: Mason Wasp?
Location: Western Pennsylvania
July 21, 2014 12:02 am
I found this on a walk through the woods today and after thorough investigation, I couldn’t quite find a match to any other wasp. The blue tinted wings and black/white body pattern lead me to believe it’s a mason wasp(?), although I don’t know enough about bees/wasps/hornets to confirm. It’s hard to tell in the picture, but the legs and antennae were both bright yellow, which I have yet to see on a Google search of any other. Help me identify? Thanks!
Signature: c.g.

Elm Sawfly

Elm Sawfly

Dear c.g.,
This is an Elm Sawfly,
Cimbex americana, and though Sawflies are classified in the same order, Hymenoptera, as Wasps, they are not true wasps and they do not sting.  The larvae of the Elm Sawfly are frequently mistaken for Caterpillars.

What's That Bug? does not endorse extermination
Location: Western Pennsylvania

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