Edit: Typo in title. It should be 6/23/18, for anyone keeping score at home.
I don't know why I forgot to post this, but anyway.
Found in an unmanaged prairie bordering a wooded creek. Actually plucked her out of a small pool of water with a male who was still attempting to mate/climb all over her. I left the two in a tube together overnight, and the male ended up passing away on... maybe Thursday? She's about 6 or 7 mm long, and a deep brownish coloration with the legs, petiole, and mandibles having being a more more reddish. The photos may not be doing justice to how dark her back is, but it's still a far cry from black. And yes, petiole singular. I only see one node, which has a conspicuous "spike" sticking up.
It had rained a couple days prior, but the morning was more muggy than wet. There could have been light sprinkles in the night.
Edited by Antsinmycloset, July 1 2018 - 4:32 PM.