\'ol. xxvi] 



ENTOMOLOGJCAI. KEWS 



8i 



Taulu I. 

 NuMBBR or CeraHHs cmpiUU os Dmcus aumrMsd 



THSOVOM TWO, THRU AMD rOOS rSKT OT %Am9 



ff 



nnuiowso 



•OIL. 



NwBMr ol IMt 



Number al pmiarW boriad ia each holt 



Number of ffim that boiad throafh 



dry aand ^ 



Number ut fliet tiMt bored tbroogh 



wel Mind ^ —.—.^ 



Naml>er ol flica that bored t hf eo g li 



toil ^ 



a 



lOO 



M 



o 



3 



too 



7 



o 



o 



a 

 14 



S 



3 



SOD 



a 

 o 

 o 



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

 species of Trypetidae were able to bore through dry sand than 

 wet aand, and that very few flies »urr«edcd In malrinif ih^r 

 way throui^h the more lumpy toil. 



IS often throw*n into the garbageon to destroy 

 ill,. ..I. Ol liic house fly and blue bottle fly, wouM probably 

 destroy the fruit fly maggots if h 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 CtratiHs in fruit. 

 ^^<^? (9) recommends submerging "it for a short space of 

 time in water." 



Gumey (3) submerged Mediterranean fruit fly maggots in 

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

 each case a brge percentage of the maggots developed into 

 adult flies. 



In an experiment, melon fly maggots were submerged in 

 fresh water for a period ^-arying from two to four days, in 

 order to determine whether such brvae would pupate and give 

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

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

 mergcfl in seven inches of distilled water which was renewed 

 daily. .After rcmnining 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 : 



