268 WASP STUDIES AFIELD 



with both antennae amputated at the base, and another 

 which had been successful in returning with one antenna, 

 in Experiment XI ; its other antenna was now cut off. The 

 one used for the first time did not return to the nest, but the 

 other now repeated the trip deprived of both these organs. 

 She did not arrive at the nest, however, until i : oo p. m. 



Nest 20 gave us one queen which had successfully made 

 this distance in Experiment XI. She was now handicapped 

 by having one-half of each antenna cut off, and liberated 

 with the others for the same flight. She never returned. 



From nest 10, two wasps were taken which had pre- 

 viously made the one-eighth-mile flight successfully when in 

 a normal condition. Now they were liberated again with 

 one-half of each antenna removed. Both of them returned 

 between 1 1 and 1 1 : 30 a. m. A third worker from this 

 nest, a fledgling, also with one-half of each antenna re- 

 moved, did not return. 



From nest 19, a worker which had been successful in 

 one of the previous tests vwas tried in this experiment with 

 its entire right antenna gone. This one returned to the 

 nest at 9 : 10 a. m. 



The insects in the foregoing tests were all liberated at 

 7 : 30 a. m. ; those which follow were released on the same 

 day and place at 3 : 50 p. m. 



The two wasps from nest n used in Experiment XI, 

 where the right antenna was removed, were now sent out 

 with both organs gone. Both returned to their nest during 

 the early part of the afternoon of the following day. 



The worker from nest 19 which successfully returned 

 minus the right antenna in the first part of this experiment, 

 was now again tried in the same flight with the other re- 

 moved. It reappeared at the nest, seeming very sprightly 

 and unhampered, in only forty minutes ! 



The same treatment was now accorded to the two wasps 



