While photographing the mound of the Allegheny mound ant I noticed what I thought was a black ant crawling on the grass that grows on the mound. It was moving fairly rapidly, but I was able to get a few photographs.
My eyes are not as good as they used to be for closeup stuff, and I did not identify it as a true bug and not an ant until I looked at the photographs.
I posted the photo to bugguide, and it has been identified as a nymph, and probably in the genus Alydus. The photograph was taken on May 15, 2010. I did photograph the species on at least one other occasion.