in H0NTH1 ^ 1:1 M 1TI\. 



7.". 



fact, the copious and sudden Bow of sap that follows any attempt by 

 the female fly to deposit eggs in these green, though well matured, fruits 

 renders the successful deposition of eggs difficult and rare. In a few 

 instances where eggs were deposited under forced and unnatural con- 

 ditions, either the eggs themselves, or the newly-hatched larvae, could 

 nut survive the action of the sap and the larva- died without eating 

 into the pulp. 



The tact thai not one of 1,044 frails of the Chinese banana ripening 

 simply and prematurely among bunches growing in the field, and in 

 which, as in the ease of other host fruits, one might expect gravid females 

 to oviposit, was found infested, has led to the conclusion that even ripe 



Fig. 18. Hawaiian mown sweet orange. The breaks made in the rind of citrus 

 fruits by the female Mediterranean fruit fly are too small to be seen without a 

 microscope when they are first made. As time passes, the tissues of the rind may 

 remain fairly normal in appearance, except for a slight hardening about the injured 

 point, or may wither and turn black as illustrated. This type of injury may appear 

 in the rind while the pulp remains unaffected. During very damp weather moulds 

 are quickly developed in these after-tea areas and the fruit breaks down rapidly. 

 (After Ba.k and Pemberton.) 



bananas are not desired as host fruits by adult flies under Hawaiian 

 conditions. On the other hand, the rearing of flies from the ripe and 

 yellow fruits of the thin-skinned Popoulu variety, as well as from the 

 ripe fruits of other varieties under forced and unnatural conditions. 

 has led to the equally acknowledged fact that ripe bananas in the field 

 nia\ serve as hosts and should therefore be properly guarded against 

 in all quarantine work. A more complete discussion of the relationship 

 between the banana and the fruit fly can be had upon application to 

 the Buret f Entomology. 



