Hadrurus spadix is a large black bodied and yellow legged scorpion found in the American Southwest. It's sting is not dangerous, per se, but is reputed to be extremely painful.
I bought this individual so i don't know where it came from, but the Hadrurus range from eastern California to past Texas. I suspect they range into Mexico as well. These scorpions are so hairy probably because they live in a hot sandly habitat. Long hairs on the legs keep the legs from sinking too far into the sand, allowing the scorpion to range about on loose sand dunes fairly well.
These scorpions are cannibalistic towards others of their species and other desert scorpions. They can grow to be 6+"/15cm+ from their "face" to the tip of their extended tail and stinger, making them the largest scorpions in the United States of America and possibly all of North America.