454 



Journal of Agricultural Research 



Vol. XV, No. 8 



Table VI. — Daily rate of oviposition of Tetrastichus giffardianus, iQi6-iy 



a Died. 



No. I to 6, inclusive, emerged on October 9, 1916. 

 No. 7 to II, inclusive, emerged on October 10, 1916. 

 No. 12 to 15, inclusive, emerged on July 27, 1917. 



PAEASITISM OF THE MELON FLY BY FRUIT-FLY PAEASITES 



Though great quantities of melon flies, Bactrocera cucurhitae Coquillett, 

 were reared in the laboratory from material collected about Honolulu 

 during the years 1914, 1915, and 191 6 after the fruit-fly parasites had 

 become established, no parasites were reared from the material until 

 September 4, 191 7. On this date, 7 normal adults of Tetrastichus gif- 

 fardianus were reared from a single melon-fly puparium. This puparium 

 was part of a quantity secured from cucumbers collected in Honolulu 

 two weeks previously. Before proceeding further it should be stated 

 that a natural parasite of the melon fly was introduced into Hawaii by 

 Mr. D. T. Fullaway in May, 191 6. It was well established by the latter 



