Welcome back, [character name]. Those arms from the Stingers are definitely not insect-like! They more look like claws on a creature that burrows in the ground, though I doubt the Stinger does much burrowing. Those arms just seem to hang from its body with little use, so I'd imagine that earlier forms of the stinger evolved form a burrowing creature. Strange that the land-based Molecreep lost its limbs and claws, while the airborne stinger kept them. I wonder if these two species ranched off from one another, of if thay've always been seperate. So many unanswered questions!