Found this on my tree. There's 2 of them. One looks like it was eaten from the inside (not shown). This one looks like it has a worm coming out of it. I didn't notice that visually until I downloaded the photo. I'm going to say that this worm or it's relative ate through the other insect.
side view doesn't show the worm or whatever that white thing is.
I did a search and it's a Cicada Nymph. This is just a shell of the body. They break out and drop to the floor and suck on the root of the tree. Read more here:
http://somethingscrawlinginmyhair.co...da-nymph-skin/