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]

The Collaborative International Dictionary of English v.0.48:

Agricultural \Ag`ri*cul"tur*al\, a.
   Of or pertaining to agriculture; connected with, or engaged
   in, tillage; as, the agricultural class; agricultural
   implements, wages, etc. -- Ag`ri*cul"tur*al*ly, adv.
   [1913 Webster]

   Agricultural ant (Zool.), a species of ant which gathers
      and stores seeds of grasses, for food. The remarkable
      species (Myrmica barbata) found in Texas clears circular
      areas and carefully cultivates its favorite grain, known
      as ant rice.
      [1913 Webster]