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Photo#1506012
Carabidae - Agonum aeruginosum

Carabidae - Agonum aeruginosum
Argyle township, Lafayette County, Wisconsin, USA
August 2, 2017
Size: 5-6mm
Collected with solar panel bucket trap. The tops of the elytra, the dark on the leg joints, and the round pronotum made me think of Agonum but I was unable to find any photos that I thought were similar.

Images of this individual: tag all
Carabidae - Agonum aeruginosum Carabidae - Agonum aeruginosum Carabidae - Agonum aeruginosum

Moved
Moved from Ground Beetles.

Agonum aeruginosum?
The "dents" on the elytra, along with the relatively smooth metallic upper body surface and small round pronotum (and pale legs, etc..) suggest that species.. I'd key it and see if that makes sense based on what you can see

 
I only have BONENA keys. Whil
I only have BONENA keys. While I'm not always good at the meaning of "-er", it appears this does key to this species. I did do some further checking of other ID'd species on BugGuide and found this comment which confirms your description and BONENA description and adds further defining characteristics:
narrow circular pronotum AND punctiform pit near each pronotal hind angle AND middle elytra with distinct tranverse indentation [Peter Messer].

 
Sounds good!
I don't think there's anything else it could be. When I looked at it earlier something seemed off, and I got nervous that there was a similar-but-strange midwestern Agonum I didn't know about. But looking now, all seems to fit fine.

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