38 



N. H. AGR. EXPERIMENT STATION. 



[Bulletin 171 



On dates marked * adults were not removed. 



Other emergence records for 1911 will be found in the discus- 

 sion of the duration of the pupal state, as summarized in Table 

 24. These records are from pupse kept in soil in flower pots in 

 the open-air insectary. Emergence from these began June 28 

 and ended August 20. The maximum was reached from July 

 7 to 25. 



Further 1911 records were secured in connection with experi- 

 ments with fowls as a means of destroying pupae and flies. In 

 these cases pupae were buried in the soil beneath the screen wire 

 cages in which the fowls were confined. These cages were in 

 the open. Some flies from these pupae escaped the fowls and 

 were recorded, the first on June 26, the last on July 8. 



In records showing the emergence from pupae buried at vari- 

 ous depths in the soil in 1911 adults began to appear in numbers 



