 they're all braconid wasps. These little braconid wasps lay these eggs, the eggs hatch, the pimpy feet on the caterpillars. In fact, the caterpillars are dead, just don't know it yet when they're covered in these eggs. And you'll see this phenomenon all through the garden. Keep an eye on it. If you see caterpillars that have these eggs on their back or right next to their body even, don't spray Bt or Spinosad