What does "harvesting" mean?

Harvesting: , from Harvest, v. t. Harvesting ant (Zoöl.), any species of ant which gathers and stores up seeds for food. Many species are known. Note: The species found in Southern Europe and Palestine are Aphenogaster structor and A. barbara; that of Texas, called agricultural ant, is Pogonomyrmex barbatus or Myrmica molifaciens; that of Florida is P. crudelis. See Agricultural ant, under Agricultural.