200 Annals Entomological Society of America [Vol. VII, 
TABLE X. 
NUMBER OF MELON FLY LARV4 WHICH PUPATED AND ISSUED AS ADULT FLIES, THE 
LARV4Z BEING SUBMERGED IN SEVEN INCHES OF WATER FOR A PERIOD OF 
TWO TO FOUR DAYS. 



Number of Days submerged | Number Number of Adults 
larvee in water pupated dead pupee reared 
100 2 75 28 47 
100 3 16 11 5 
100 | 0 0 0 




From this experiment one could conclude that infested 
vegetables may be submerged in a barrel or tank of water for 
a period of four days and then plowed under without danger 
of having melon flies emerge from this material. By following 
this method a valuable fertilizer is added to the soil. Un- 
doubtedly, certain chemicals could be added to the water which 
would destroy the melon fly larve in the infested vegetables in 
less time, but this again, would increase the cost. 
Burning or boiling maggoty vegetables is somewhat expen- 
sive on account of the fuel consumed. The old vines in seri- 
ously, infested, cucurbit fields were often pulled out of the 
ground, raked together in piles, the infested vegetables were 
scattered within these piles and then all was burned. Some 
kinds of infested vegetables could be boiled and then fed to 
hogs. 
28. Screening or netting—Attempts to grow the various 
kinds of Cucurbitacee in Hawaii are carried on mostly by 
Japanese and Chinese. . Many of these cultivators screen the 
newly set cucurbits with pieces of gunny sac, paper bags, 
newspapers or straw. Some of the growers screen their melon 
and cucumber beds with cheese cloth or mosquito netting but 
as Froggatt (5, p. 18) states, ‘though it kept the flies out it also 
kept all the bees and small insects that, under ordinary con- 
ditions, fertilize the flowers, so that very few melons ever set 
and matured.’”’ Hand pollination could be resorted to, but 
this method would require a considerable amount of labor. 
One individual who attempted to grow pumpkins hired a 
Japanese who removed from the vines, the staminate flowers 
which were seriously infested with the larve. Screening the 
vines is not at all practical except possibly for a few vines in a 
