Sonth Kona covered 26 to 28 miles of almost continuous coffee 

 fields, eighteen fields about one and one-half miles apart having 

 been investigated. The result showed that both the Australian 

 and South African parasites were in evidence in all the fields in 

 South Kona. while there was a scarcity of the former in those in 

 North Kona. This may. have been caused by the scarcity of ripe 

 berries in certain fields visited. In North Kona both sexes of the 

 Australian parasite {Diachastna tryoni) were captured over 

 tvventy miles from the original place of distribution, the tlate of 

 which, as previously stated, was June 12, 1913. 



Hierewith I am submitting you a statement giving details of 

 all the captures of these parasites in the many fields visited and 

 which have been above referred to. You will note that all cap- 

 tures were made with a small hand net — by either sweeping or 

 when the insects were on the wing, principally by the latter 

 method. 



During the above investigations I was accompanied and as- 

 sisted by Dr. E. A. Back, who is in cliarge of the Federal fruit 

 fly investigation here. Dr. Back also took samples of berries 

 from each of the eighteen fields visited with a view to later de- 

 termining, if possible, the percentage of fruit ll}' and parasites at 

 the time of our visit. 



In conclusion I will state that the infestation of the coffee ber- 

 ries by fruit fly in the Kona district is this year at least fifty per 

 cent less than a year a'go. In some of the fields it was difficult to 

 find any great infestation at all. 



Respectfully submitted, 



W. M. GiFFARD, 



President and Executive Officer. Board of Agriculture 

 and Forestry. 



Investigations as to distribution of Opiiis Iiinnilis and Diac/iasiiia 

 tryoni throughout the coft'ee fields in South and North Kona. 

 cither one or both of these having been collected by W. AI. Gif- 

 fard and Dr. E. A. Back in the following fields over a distance 

 of twenty-six miles between October 28 and 31. both inclu- 

 sive, viz : 



( In all these fields Dr. Back gathered samples of ripe berries 

 and either saw or took parasites, whilst Giffard confined his work 

 to collecting adult specimens on the wing or by sweeping. In all 

 instances only a small number of parasites were taken, many of 

 those captured having been liberated.) 



SOUTH KONA. 



No. 1. Oct. 31. 191-1 — At Kalahiki, one and one-half miles 

 .south from Ilookena Church on main road, h'ield scarce of ber- 



