The Collaborative International Dictionary of English v.0.48:

Harvesting \Har"vest*ing\,
   a. & n., from Harvest, v. t.
   [1913 Webster]

   Harvesting ant (Zool.), any species of ant which gathers
      and stores up seeds for food. Many species are known.
      [1913 Webster]

   Note: The species found in Southern Europe and Palestine are
         Aphenogaster structor and Aphenogaster barbara;
         that of Texas, called agricultural ant, is
         Pogonomyrmex barbatus or Myrmica molifaciens; that
         of Florida is Pogonomyrmex crudelis. See
         Agricultural ant, under Agricultural.
         [1913 Webster]