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Cicindela sexguttata
They are commonly found in the deciduous forests in between the Minnesota and Ontario and south to Kentucky, and are easily recognizable by their large, white, overlapping mandibles. The imago (adult) is 12–14 mm in length,with long legs. The large white mandibles, give these attractive insects a ferocious appearance. Although they are strong enough to subdue their prey, they do not bite humans unless handled.
Gorgeous (though I think they are also scary looking) Tiger Beetles... there are some similar green ones. I'll see if I can pin point them.