Vol. xxvi] 



ENTOMOLOGICAL NEWS 



Si 



TABLE I. 

 NUMBER OF Ceratitis capitata OR Dacus cucurbitae WHICH BURROWED 



THROUGH TWO, THREE AND FOUR FEET OF SAND OR SOIL. 



It is evident from this table that a larger number of both 

 species of Trypetidae were able to bore through dry sand than 

 wet sand, and that very few flies succeeded in making their 

 way through the more lumpy soil. 



Lime, which is often thrown into the garbage-can to destroy 

 the larvae of the house fly and blue bottle fly, would probably 

 destroy the fruit fly maggots if it was buried in sufficient quan- 

 tity with the infested fruit and vegetables, but this method 

 would increase the cost. 



As a means of destroying the maggots of Ceratitis in fruit, 

 Penzig (9) recommends submerging "it for a short space of 

 time in water." 



Gurney (3) submerged Mediterranean fruit fly maggots in 

 sea water "for periods varying from 6 to 45 hours" and in 

 each case a large percentage of the maggots developed into 

 adult flies. 



In an experiment, melon fly maggots were submerged in 

 fresh water for a period varying from two to four days, in 

 order to determine whether such larvae would pupate and give 

 rise to flies. Larvae were selected which had bored out of a 

 pumpkin and were ready to pupate. These maggots were sub- 

 merged in seven inches of distilled water which was renewed 

 daily. After remaining in the water for two, three or four 

 days the larvae were transferred to filter paper and after pupa- 

 tion the puparia were placed in moist sand in a breeding jar. 

 The following table indicates the results obtained: 



