This critter is a mystery in a couple of ways.
The first: I don’t know exactly what it is, other than “caterpillar”.
I’ve been doing searches, and the closest I can guess is that it’s some variety of tussock moth. It’s quite tiny – smaller than my fingernail. I’ve never seen anything like it around here before.
The other mystery is, where did it come from?
I was at my computer, typing away, when it dropped onto my keyboard.