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trace of further damage to his fruit. It was not until Septem- 
ber of this year that it was definitely determined that the fruit fly 
was here when Mr. Terry and Dr. Perkins of the Hawaiian 
Sugar Planters’ Association Experiment Station found some 
adult flies on the window of the laboratory. Mr. Terry made a. 
diligent search in several localities and found some oranges and 
limes on the slope of Punchbowl which were punctured and con- 
tained maggots. I also continued my investigations and found 
infested oranges in the vicinity of Makiki fire house, Kewalo, 
Kinau and Keeaumoku streets. From all this material we suc- 
ceeded in raising the adult Mediterranean fruit fly with many 
Drosophillids and a few Notogrammas, these latter only drawn 
to the fruit on account of fermentation and decay. 
On September 20th I reported the finding of the adult flies to 
Hon. Abarston Campbell and suggested the advisability of keep- 
ing matters from the public until we had actually succeeded in 
rearing the adult flies from the infested oranges in our breeding- 
cages. At the last meeting of the Board I was able to report 
definitely that we had reared the flies and recommended that we 
notify the California State Commission of Horticulture officially 
before this matter appeared through the newspapers. This has 
been done and I expect to receive an answer from California by 
the next mail. 
From my observations I may state that the Mandarin orange, 
lime and common seedling orange appear to be attacked quite 
severely whereas the Navel orange is only slightly attacked. I 
have also failed to find any other fruits attacked by the pest and 
further observations will be necessary to determine what damage 
this fly will do to our island fruits. - There seems to be quite a 
discrepancy in the record of the food of this pest as reported by 
writers in various countries and we shall no doubt be able to 
find out many new phases from our investigations. 
Now that this pest has established itself on Oahu I would 
recommend that the Board pass a regulation, if this can be done, 
to prohibit the shipping of Oahu grown fruit to the other islands 
and I have made a rough draft of such a regulation which I here- 
with submit for your kind consideration. Further reports will 
be made from time to time as new observations are made. 
Respectfully submitted, 
Edw. M. Ehrhorn. 
Superintendent of Entomology. 
