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Posted: 2012/10/8 13:22 Updated: 2012/10/8 13:23
From: South Jersey
I am no entomologist but I believe it to be a "ground beetle." I found it at this link: http://www.entomology.wisc.edu/insectid/insect_info.php?131
Please let me know if I am wrong. Were the trout feeding on them?