Mystery Egg Sack

Maybe for a spider? Maybe some other bug... I found this white egg sack inside a rotten stump of a large tree. Do any of ya'll know what kind of babies are going to be born of this beautiful thing?!
There are really no other words for the elegance and delicate nature of this exterior womb.
XoXo

Praying Mantis Egg Sack

This Praying Mantis egg sack is attached to some wispy vines on my porch- isn't it elegant? It is really similar to a tiny bee's nest...but doesn't everything in nature look like some other beautiful thing in nature!
This second picture is a view from the top, showing how it is delicately attached to the vine with it's dried gluey goo sack. This will withstand rain, big wind, snow and all the elements, peacefully swinging on it's vine.