This is called a Crow Stitch because when people were first working out beadwork technology and studying American Indian art, they looked at some Crow pieces and saw that they used this stitch a lot. Not that just Crow people use this stitch, for heaven's sake, but they did make great use of it!
It's really a nice stitch. It has the affect of an Applique with a lot less work and takes a lot less time. Basically, this is a combination of 2 stitches - the Lazy Stitch and the Applique.