TRYPETIDiE. 
633 
rule, but not always, leave the fruit and fall to the ground, where they 
burrow to a depth of one to two inches and pupate, the pupal stage 
Fig. 418 —The Life-history of a Fruit fly (Dacus Cucurbits). The eggs 
(right side of Figure) lying just under the skin of a gourd; of the 
TWO FIGURES BELOW THE PUPARIUM, THE UPPER IS THE ANTERIOR END SHOWING 
anterior Spiracles, the lower the Posterior end and the Posterior Spir¬ 
acles. (x 8). 
