186 Annals Entomological Society of America [Vol. VII, 
inate flowers were cut from pumpkin vines in the field and 
placed in twelve breeding jars. The following figures indicate 
the number of adults which were reared from each flower: 
10, 14, 19, 23, 24, 25, 31, 32, 33, 37, 63 and 64% a total of 375 
or an average of 31 flies for each flower. 
A similar experiment was performed with a half dozen 
pumpkins. The cucurbits were of different sizes and were 
taken from the field and placed in separate breeding jars. The 
following figures show the size of the pumpkins and the number 
of adults reared from each. 
From a pumpkin 24% inches long, 277 melon flies were bred. 
From a pumpkin 3 inches long, 183 melon flies were bred. 
From a pumpkin 314 inches long, 378 melon flies were bred. 
From a pumpkin 3% inches long, 464 melon flies were bred. 
From a pumpkin 4_ inches long, 637 melon flies were bred. 
From a pumpkin 434 inches long, 283 melon flies were bred. 
2222 total. 
From twelve, infested, green-podded string beans gathered 
in the field, the following number of melon flies were reared: 
4,7, El, 14, 12) 14, 16,25, 16, 46; 18 and 26:"a total-ot tGsior en’ 
average of 13 flies for each pod. 
VI. lare History, 
Although the melon fly has been very destructive during 
the past sixteen years in Hawaii, the duration of the different 
stages of its life history have never been determined. Clark 
(1, p. 6) makes the following statements on the life history of 
this pest. The fly ‘‘stings’’ not only the fruit with its ovipositor, 
but also the young and tender growth of the vines, depositing 
a number of eggs, which soon hatch into small, white maggots. 
that feed on the tissues of the fruit causing it to decay. After 
the maggot has attained its growth, it descends into the soil 
where it develops into a small chrysalis of a light, yellowish 
brown color, and in about ten or twelve days comes out a 
perfect insect, ready to repeat its mission of destruction. I 
do not know how many generations it will produce in a year, 
but in the warmer and drier districts I believe it will breed the 
year through, except possibly a while during the winter months, 
and then its development is only retarded by the cooler weather, 
which prevents the chrysalis maturing so rapidly.” 
