The smooth shiny dome gave it away for me. This critter much like a caterpillar is a wormy-looking creature with six true legs and a multitude of prolegs (not pictured) which are the suction cup-like appendages at the back end. Caterpillars can have up to 5 pairs of prolegs; I believe sawfly larvae always have more (but I’m not a hundred percent on that). They also tend to be less hairy in my experience than their caterpillar colleagues. And of course, upon emerging, there are no bejeweled wings with colorful scales, but rather a creature that looks like yet another more familiar, um…face, such as cousins like the flying ant or a wasp or some combination of the two.