Centipede

And as for the centipede's venom--our North American species probably aren't big enough to do much harm to humans, so no worries there. It's the tropical species that are more of a danger, as Scott hinted at.

Great find! I've been learning about the Myriapods lately and went out the other day and collected about six millipedes and centipedes, I can't wait to identify them all.

I find last picture very sensitive...!!

I live with someone who studies critters like this and keeps a giant venomous Scolopendra, so your photos looked familiar.

Very tough to identify old age creatures..!!

That's a pretty impressive centipede. How big was it? It looks like a Scolopendra-type centipede, maybe Scolopocryptops sexspinosus. Here's a BugGuide page that might help: http://bugguide.net/node/view/97562/bgimage. Some of the tropical Scolopendra centipedes are dangerously venomous.

http://en.wikipedia.org/wiki/Centipede

http://en.wikipedia.org/wiki/Millipede