430 THE AMERICAN NATURALIST [Vol. XLVII 



in diameter, and in each chamber a cellular ball of che wed-up 

 vegetation is made to fit loosely. The eggs are stuck to the walls 

 of the cells and are presumably hatched by the heat from the 

 organic matter. A ball freshly dug and containing the eggs is 

 always noticeably warm. 



I have never seen the eggs being put in place, but have been 

 told that they are carried from the queen and put in place by 

 the workers. 



Fig. 1 gives a section through an ant-hill as shown in an exca- 

 vation made to get clay for plastering the walls of a house. 



