370 



Journal of Agricultural Research 



Vol. III. No. 5 



Table III.- — Daily rate of oviposition of the Mediterranean fruit fl-y. Females emerged 

 on February 28, IQ14; hence, were 4 months old on June 28, 1914 



Date of oviposition. " 



July I 



2 



3 



4 



5 



6 



7 



8 



9 



10 



II 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23 



24 



Total 



Number of eggs deposited. 



Fly No. 1. Fly No. 2. Fly No. 3. Fly No. 4. Fly No. 5. Fly No. 6. 



10 



4 



5 



"•So 



h 



4 

 o 



4 

 6 



7 

 o 



13 



71 



C) 



o 

 6 

 o 

 o 



12 



6 



13 

 2 



4 



{") 



43 



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



b Died on this date. 



c Aug. I, 1914: These females are still alive and give promise of sexual activity for some time to come. 



Oviposition experiments are still in progress; hence, no estimate can 

 be made of the maximum egg-laying capacity of the female Ceratitis 

 capitata. It is evident, however, from the data in Tables II and III 

 that the females lay small batches of eggs quite regularly throughout life. 



DIFFERENCES IN HABIT BETWEEN THE ADULT MEDITERRANEAN FRUIT FLY 

 AND THE ADULT MELON FLY 



Those desiring to rear the melon fly {Bactroccra ciicurbiiae Coq.) or 

 parasites of its eggs and young larvae will find marked differences in habit 

 between this and Ceratitis capitata. These same differences will prob- 

 ably be found to occur between species of Dacus and Ceratitis. There 

 is very little difference found by the writers in the egg, larval, and pupal 

 stages. The adults of the melon fly are far more hardv than adults of 

 C. capitata. The writers have on hand many adults 6 months old which 

 give every promise of living indefinitely, as very few have died during 

 the last few months and those living are as active as when newly emerged. 

 The adult melon fly exhibits no sexual activity for such a long period 



