Never leave mantis egg mass in open container on kitchen table.
I am still picking tiny mantids off the lights, the mini-blinds, the walls, the keyboard, etc. Can't really reach the ones on the ceiling.
I managed to get most of them (100 or so) out in the garden where they belong. It's gotten dark; they are out there all alone right now in the dark hot night, not even a day old, maybe eating things smaller than themselves; maybe being eaten by larger things.
The guy who sold the ootheca to me said these are Chinese mantids. Maybe this is them. More to come as they grow up.