WHAT IS PHYSICAL LIFE 



ders herself, this benevolent arrangement is 

 for the purpose of providing jiroper baby 

 food for her young. But how in the world 

 did she inherit this most complex way of 

 doing things ? It would not have done at 

 all to kill the spiders with her sting, for 

 this larval wasp must have only living 

 meat, and not even meat kept in cold 

 storage. 



But the genus hymenoptera includes not 

 only bees, wasps, hornets, and other insects, 

 but also the ants, and we might fill pages 

 with the curious hereditary habits of the 

 ants alone, which are as inexplicable as 

 any of the rest. To ascribe them to In- 

 stinct is simply to get behind the most ex- 

 pansive of all words for veiling blank 

 ignorance. 



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