Gastropacha Americana

from The Collaborative International Dictionary of English v.0.48

Lappet \Lap"pet\, n. [Dim. of lap a fold.]
   A small decorative fold or flap, esp. of lace or muslin, in a
   garment or headdress. --Swift.
   [1913 Webster]

   {Lappet moth} (Zool.), one of several species of bombycid
      moths, which have stout, hairy caterpillars, flat beneath.
      Two common American species ({Gastropacha Americana}, and
      {Tolype velleda}) feed upon the apple tree.
      [1913 Webster]