Tortoise beetle larva, Cassidinae (possibly parasitized), from Panama.
Metalmark butterfly caterpillar, Anteros sp. (Riodinidae), from Panama. Its funky neon 'hat' is actually an inflated protrusion that is thought to store and disperse a noxious chemical as a method of defense.
A predatory syrphid fly larva (Syrphidae) sneaks up on an unlucky cluster of aphids (probably Uroleucon sp.) in Iowa.
