AMMOPHILA AND HER CATERPILLARS 



between the mandibles, the subject of the treatment 

 being turned around and around so that all sides may be 

 equally affected. 



In our third case a caterpillar which we had caught 

 was placed in front of a wasp just after she had carried 

 the second larva into her nest. She seemed rather indif- 

 ferent to it, passing it once or twice as she ran about, but 

 finally picked it up and gave it one prolonged sting be- 

 tween the third and fourth segments. She then spent a 



AMMOPHILA URNARIA STINGING CATERPILLAR 



long time in squeezing the neck, pinching it again and 

 again, after which it was left on the ground; and as she 

 showed no further interest in it we carried it home for 

 further study. 



27 



