Pyrrharctia isabella

from The Collaborative International Dictionary of English v.0.48

Isabella moth \Is`a*bel"la moth`\ (?; 115). (Zool.)
   A common American moth ({Pyrrharctia isabella}), of an
   isabella color. The larva, called {woolly bear} and {hedgehog
   caterpillar}, is densely covered with hairs, which are black
   at each end of the body, and red in the middle part.
   [1913 Webster]