( “ter [xxvi 
only came from a few hundred feet below, their chances of 
meeting each other had been multiplied thousandfold. He 
quite agreed with Dr. Chapman that hybernation may have 
played an important part in the instinct in the case of the 
Coccinellide but not in that of Dorcadion, the Ammophila, 
or the swarms of ants. 
