262 WASP STUDIES AFIELD 



return. However, none returned from this greater dis- 

 tance. 



Nest 19 gave us two workers of unknown age but each 

 bearing a white mark, indicating that it had made the one- 

 eighth-mile flight previously. Neither of them came back. 



Nest ii. The one wasp which was taken from this nest 

 still bore the marks which identified it as the one used in the 

 mail-box trial on July 9 (Exp. VIII). Despite its previous 

 successful trip in Experiment VIII, it did not return to the 

 nest this time. 



Nest 1 8. Just as in the preceding instance, one worker 

 which had successfully made the trip in Experiment VIII 

 was again taken, but this time it never reappeared at the 

 nest. 



Nest 22 was a newly discovered nest in the smoke-house, 

 which had only one adult, two sealed cells and a half-dozen 

 other young. This sole proprietor, presumably the queen, 

 was taken on this journey, but never returned. 



Nest 20. A young worker, five days old, was taken on 

 this long trip, but, as was to be expected, it did not reappear. 



From nest 6, three wasps whose markings proved that 

 they had successfully made the one-eighth-mile trip on July 

 8 (Exp. VII), were again used in this experiment, but not 

 one returned this time. 



Nest 13. Two workers, of unknown age, were both lost. 

 In this experiment it is at once evident that no w r orker 

 taken out for the first time was able to find its way home 

 over a distance of one and eight-tenths miles, and even other 

 workers and worker queens, although they had successfully 

 made other return flights, were unable to do so at this 

 distance. It might be suggested that the meteorological 

 conditions on that day were peculiar, in some way hindering 

 their activity, but we must not lose sight of the fact that 

 the queens from nests 24 and 25, acting as a check upon 



