Need help with id on Beetle
Hello,
I live in Aston, PA and while leaving for work one morning I found this beautiful irridescent green beetle in our stairwell. In all my 51 years I’ve never seen one of these guys. I am attaching two photos of the top and bottom of this beautiful beetle.
Elwood McKay

Hi Elwood,
This is a Caterpillar Hunter, Calosoma scrutator, one of the Ground Beetles. Both adults and larvae have ravenous appetites for caterpillars, and they are very helpful in the control of the pestilence known as the Gypsy Moth.

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