THE MELON FLY IN HAWAII. 



27 



mer months) after having been given access to host fruits. Under- 

 like conditions fly No. 2 deposited 2, 17, 13, 12, 4, 7, 16, 14, 28, 8, 

 12, 17, 12, and 29 eggs, respectively, per day during the first 4 months. 



Fly No. 1 of Table IV, which was not given access to host fruits 

 until she was nearly 8 months old, deposited, as indicated, 21, 7, 13, 3, 

 18, 13, 10, and 2 eggs on different days during the ninth month 

 (October- November) of her life. Fly No. 2 of Table IV, which 

 was not given access to host fruits until she was nearly 9| months 

 old, deposited 6, 2, 7, 6, 3, 6, 1, 3, 12, 3, 3, 8, and 4 eggs on different 

 days during the eleventh, twelfth, and thirteenth months of life, 

 which also were the last 3 of life and colder than the average for 

 December, January, and February at Honolulu. 



The melon-fly female differs from the female of the Mediterranean 

 fruit fly in that she deposits a larger number of eggs per day at 

 greater intervals instead of a smaller number almost daily. Fly No. 

 4, Table II, very closely approached the habit of Ceratitis capitata 

 by depositing a small number of eggs daily with great regularity 

 from November 2 to the middle of the month. It will be noted that 

 the flies whose records appear in Table IV averaged 10 and 6 eggs, 

 respectively, for each day on which they oviposited, which compared 

 quite favorably with the averages of 9.5, 13.6, and 13.5 of Table III 

 and 14.9, 9.4, 6.3, 5.3, 10.3, 7.6, and 13.1 of Table II, especially when one 

 considers the small number of flies under observation and the varia- 

 tion in egg-laying capacity shown by the larger number and very 

 much younger flies of Table II, and the colder months of the year 

 during which the eggs were deposited. Fly No. 1 of Table II, which 

 deposited a total of 687 eggs, averaged but slightly over 3 eggs per 

 day during the 227 days between the time when she deposited her 

 first and last eggs. 



Table II. — Daily rate of oviposition of the melon flies that emerged on May 25 

 and were placed separately with fruit on June 25, 1914. 





Number of eggs deposited. 



Date of observation. 1 



Fly 

 No. 1. 



Fly 



No. 2. 



Fly 



No. 3. 



Fly 



No. 4. 



Fly 



No. 5. 



Fly 



No. 6. 



Fly 



No. 7. 



1914. 

 July 10 













23 





11 







13 





17 





15 



14 







12 





17 





9 





14 





18 



19 











19 













19 



21 













6 





22 



13 













23 









10 







24 









3 







26 











23 





27 



29 













29 









21 















10 



5 





2 





15 







1 Dates on which none of the flies oviposited are omitted from the table. 



