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N.S. ENTOMOLOGICAL SOCIETY. 



6th. The latest fly emerged on Sept. 29th, while the period during which 

 the most emergence took place,was during the last two weeks of jAugust. 

 After emergence,the flies rest for some time to allow their wings to 

 fully expand, and while their brownish color changes to black and while 

 the^ptilinum recedes. 



Depth from which Adults will emerge. From what depth will the 

 flies work their way up to the surf ace of the soil? To determine this point, 

 pupae, in lots of one hundred, were buried at different depths beneath our 

 special rearing boxes, the soil being pressed above them, but not pounded. 

 The following table shows the emergence from these cages: 



TABLE III. 



It is curious to note that more flies struggled up 18 inches than there 

 were in the 12-inch box. But the depth of six inches had not the slightest 

 effect upon the emergence. This latter point has a practical bearing, 

 as it shows that plowing under infested fruit in an effort to bury the mag- 

 gots, would be of little value, if any. 



Adaptation of Emergence to Variety of Fruit. 



It has often been questioned whether the adults adapt their emer- 

 gence to the variety of fruit they are infesting, that is, if flies resulting 

 from larvae infesting early fruit, appeared sooner than those from fall 

 fruit. A number of the pupae were obtained from summer apples and 

 from Gravensteins, and the emergence was recorded, as in Table IV. 

 Evidently the "summer" adults did not appear any sooner than did the 

 "fall" ones; but unfortunately these summer apples were not of a very 

 early type, and so we should not base too much upon these figures. 



