Real scorpions do have mouths. They're just small, and tiny, and not so huge as in the Archnathid. And lets just say I was lazy. They have the mandibles for snipping up food before it goes in the mouth
The hole appears to be part of an old shell-flattening that I never noticed. I made this thing's actual model AGES ago, hence why <_<;;
But really, this is an OLD model with a new skin