ENGINEERING METHODS 



converge upon the entrepot of the colony. They facili- 

 tate transportation by making communication easier and 

 quicker. However they may have arisen in the history 

 of the harvesting habit's development, or with what pur- 

 pose (if any) originally constructed, the facts are as stated. 

 And they do not stand alone. In the summer of 



Fig. 35 



Fig. 38 



Fig. 35 AGRICULTURAL ANTS CUTTING GRAIN TO CLEAR 

 ROADS AND DISKS 



Fig. 36 ANT CARRYING A PELLET OF SOIL 



Fig. 37 A SPECIMEN OF GRAIN-STALK ON AN ANT CLEARING 



Fig. 38 AGRICULTURAL ANT CARRYING GRAIN-STALKS 



57 



