quote:

Brown recluse bites have a tendency to go necrotic. Didn't stop off in some motel on the way home did you

You beat me to it. That would have been my first guess -- some sort of spider.

My late grandfather had a brown recluse, which he killed, nail him on the inside of his thigh many years ago. The bite site looked identical to that photo after a couple days. I've also seen at least two black widow bites that appeared similar.

Here's a photo from CDC of one in advanced state.



And.. this is a typical Lyme disease indicator: