February, '13] HERRICK: cherry fruit FLIES 79 



injury by this insect would be greatly reduced, and the same holds 

 true with the brown-tail moth. In certain sections the oaks pre- 

 dominate, but the region is suitable for growing white pine, which is 

 far more valuable, and it is becoming apparent that the oaks will be 

 eliminated, either gradually as a result of moth attack and other insect 

 inj ury or by the efforts of man to bring about a better forest condition 

 which will at the same time serve to hold these destructive pests in 

 check. 



Woodland owners outside the moth infested area should interest 

 themselves in the proper care of their woodlots and should eliminate 

 the oak growth as rapidly as possible so that the trees in their forests 

 will not furnish suitable food for the species when it arrives. In 

 the infested woodlot the problem is more pressing and difficult and 

 needs immediate action if great injury is to be prevented. 



President W. D. Hunter: The next paper will be presented by 

 Mr. Glenn W. Herrick. 



Mr. Glenn W. Herrick: With the consent of the Association I 

 wish to read at this time a paper on the control of two fruit flies, 

 Rhagoletis pomonella and R. fausta, as a substitute for the one on the 

 printed program.^ 



ABSTRACT OF PAPER ON THE CHERRY FRUIT FLIES 



By Glenn W. Herrick 



The results obtained by Mr. lUingworth in controlling the apple 

 maggots encouraged him to try similar control measures against the 

 closely allied cherry fruit flies. 



It was soon discovered that, in addition to the old species, Rhagoletis 

 cingulata, another little known species, Rhagoletis fausta was present 

 and doing much injury to the fruit. This species had been reported as 

 injurious to cherries in British Columbia in 1907. 



The flies were first seen in the orchard on June 8, 1912. They were 

 first seen ovipositing in the field on June 24. The first maggots were 

 found June 30. Full grown larvae emerged from cherries on July 8. 

 By the middle of July most of the larvae of R. fausta were found to 

 be mature. 



The length of life of the flies confined in glass cages was one month. 

 The flies were supplied with drops of water daily and fed with crushed 

 cherries. 



1 The paper on "Some External Parasites of Domestic Fowls," has been submitted 

 by Professor Herrick for publication and appears below. 



