The larvae of Warty Leaf Beetles are sometimes called Casebearers because they protect themselves with a case they construct of their own fecal material. Interestingly, their adult life is also frass-related, since their warty brown body resembles a caterpillar dropping. Presumably predators don’t given them a second glance.
In West Virginia a good place to look for Warty Leaf Beetles (larvae or adults) is on the leaves of Alder or Blackberry.
