32 



HARVESTING ANTS. 



far into the living rock in places where it happened to 

 be of an even grain, and not gritty or pebbly as it fre- 

 quently is. It was quite by chance that I first dis- 

 covered this very interesting fact, having tracked a 



train of seed-bearing workers to a part of the sand- 

 stone rock where steps had quite recently been hacked 



out leading to some terraces. 



