8i6 LIFE : OUTLINES OF GENERAL BIOLOGY 



chewed leaves, and that this forms their sole food when they are 

 beneath the surface. So there are beetles that grow an "ambrosia" 

 mould and are indubitable cultivators ; and the keeping of aphides 

 as cows is well-established for several species of ants. Recent work 

 has shown that day after day the same ant may bring the same 

 aphis out of the stable in the morning, deposit it on the pasturage 

 of a branch, milk it during the day, and take it home in the cool 

 of the evening ! Is there not here more than the beginning of a 

 sense of property? 



We need not continue the story, for our simple point is to show 

 that the correspondence between animal and human industries is 

 real, not fanciful. The parallelism is a very interesting one, and 

 should be followed by observation and by reading. 



