|Pirate spider, Mimetid sp.|
She is about 3 or 4 mm. long (body only), and like all pirate spiders, has a comb of long spines on her front legs.
And she's wearing a cat face.
To kill a large spider, "Kitty" bites him on a leg. Her venom, specifically suited for arachnids, kills him quickly. Then she eats him slowly, holding him with those spiny front legs, and sucking the juices out of one leg at a time; he's too big for one meal.
Crawling around under my desk and behind the furniture, looking for more spiders, I discovered many empty spider corpses. "Kitty" has been busy.
A couple of years ago, I found another of these here. The photos of this one were taken from a different angle, and she seems to be wearing sunglasses.
The good people at BugGuide identified her for me.