I got a hot tip that these are Centruroides sculpturatus.
(Thanks, mandelich) Here are some better pics. It's not that I doubt the ID I got so much as I just want to show some better close-ups to be sure. And show off my little pets! Haha.
I caught these in southeast Arizona. There are two of them. They both look the same underneath so I suppose they are female, since apparently the females are the ones who are okay with living with other scorpions.
I'm having quite the time watching them move around the tank. Eventually I will get to see them feed. I've been giving them flies, butterflies, moths and other bugs from my Wisconsin yard.
Also, here is the habitat I have them in now. It is aquarium gravel, which I don't know whether I ought to change to something like soil or shredded coconut. And I'm thinking I might need a bigger slant of bark in there so they have room to moult. They might do that inside the deer skull if they have room, I don't know.
Thanks for taking the time to check this out. Just drop me a comment if you can confirm the species. (and sex.) Thanks!