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Chauliognathus marginatus
If you look under "identification" in the link below, you can see in C. marginatus, there is a black line through the pronotum, whereas in C. pensylvanicus, there is just a black patch on the pronotum. C. pensylvanicus is also a species usually found in late summer, whereas C. marginatus would be more common at this time.
http://bugguide.net/node/view/2668
Spotted on Jul 7, 2013
Submitted on Jul 8, 2013
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