July, 1914.] THE APPLE MAGGOT. 39 



on June 28, there having been a single earlier emergence on June 

 22. The emergence was practically at an end by the middle of 

 July. 



Emergence in 1913. In the summer of 1912 preparations 

 were again made for securing normal emergence records in 1913. 

 The arrangements were similar to those made for the 1911 

 records. Piles of infested apples were placed on the ground, on 

 sod, and allowed to rot. In June, 1913, screen wire cages were 

 placed in position and the adults removed daily as found. Emer- 

 gence was recorded from six such cages. 



Three of these cages, comprising Lots 1, 2 and 3, were located 

 in whole or partial shade. Each cage was made of a light wood 

 framework covered with screen wire. Lots 4 to 6 were wood 

 cages with screen wire tops and stood in the open. The apples 

 beneath the latter cages were of miscellaneous character, but a 

 considerable proportion were late fruit, such as Tolman Sweet. 



The emergence is summarized in Table 4, together with the 

 corresponding weather records from the data of the local weather 

 bureau. The first three columns represent the records of Cages 1, 

 2 and 3, where the variety of apple and date of placing were 

 definitely recorded. The fourth column is the total of cages 4, 5 

 and 6, where miscellaneous apples were used but a considerable 

 part of them late fruit. 



It will be seen that emergence began July 10, quickly reached 

 a maximum from July 15 to 23, and rapidly diminished at the 

 close of the month, with scattering records from time to time 

 through August, up to August 22. 



Note should be made of the fact that all of June and the first 

 third of July were characterized by extreme drought. The total 

 rainfall June 1 to July 9, inclusive, was .20 inch, this precipi- 

 tation occurring June 21. 



Additional emergence records for 1913 will be found in Table 

 25, in which are summarized the records of adults maturing from 

 two-year-old pupse. With these it will be noted that the first 

 adults appeared July 11, and emergence was completed July 29, 

 these dates agreeing in general with those in Table 4. 



