I have looked and looked for this pattern never knowing the name. (The blog where I originally saw it never credited dmc or the actual name.) I found it accidentally on a russian site. (Yahoo!!!!) I then found it here as a PM4 pattern. Now you can have it in either PM4 or here as PDF! Enjoy my treasure!
The photo really doesn't do this justice. The photo with the XSD file really shows the delicacy well. It looks like black lace when stitched up. Simple, elegant, and breathtaking. I saw it worked up in a blog years and years ago and have been on the look out ever since.