306 



The methods employed iu carrying on the experiments were the same 

 as last year, except that, in view of the results already obtained, the 

 earth in which the insects had developed was not treated with water, 

 but examined carefully on the dates given, and a record kept of the 

 number of adult beetles found. For vivaria, 8-inch drain tiles, the 

 same as last year, were used. 



Experiment No. 1.— June 13, 1889, one hundred and fifty Wild Goose Plums, from 

 Aper's orchard. La Fayette, containing one hundred and eighty-five egg punctures, 

 were placed in vivaria. 



Result of examination on September 4 : Thirty-eight adults. Dead. 



Experimevt No. 2. — June 13, fifty Mariana Plums, from Experiment Station orchard, 

 containing eighty-six egg punctures, were placed in vivaria. 



Result of examination on September 4 : Fourteen adults. Dead. 



Experiment No. 3.— June 18, fourteen Kansas Sand Plums, from E. Yenowiue, Ed- 

 wardsville, Ind., containing fourteen egg punctures, placed in vivaria. 



Result of examination September 3 : Four adults. Dead. 



Experiment No. 4.— June 18, six Nectarines, from E. Yenowine, Edwardsville, Ind., 

 containing seven egg punctures, placed in vivaria. 



Result of examination September 3: Nothing. 



Experiment No. 5.— June Ifi, twenty-four Chickasaw Plume, from E. Yenowine, Ed- 

 wardsville, Ind., containing twenty-four egg punctures, placed iu vivaria. 



Result of examination September 3 : Five adults. Dead. 



Experiment No. 6. — June 19, two hundred and twenty-five Coe's Golden Drop Plums, 

 from J. G. Kingsbury, Irviugton, Ind., containiug six hundred and eleven egg punct- 

 ures, placed in vivaria. 



Result of examination September 2 : One hundred and nineteen adults. Dead. 



Experiment No. 7.— June 19, three hundred and sixty-eight Wild Goose Plums, from 

 orchard of Albertson and Hobbs, Bridgeport, Ind., containing seven hundred egg 

 punctures, placed in vivaria. 



Result of examination September 4 : One hundred and eighty-one adults. Dead. 



Experiment No. 8. — June 19, one hundred and sixty-seven Nectarines, from orchard 

 of Albertson and Hobbs, Bridgeport, Ind., containing five hundred and thirty-three 

 punctures, placed in vivaria. 



Result of examination August 28: Fifty-three adults. All living. 



Experiment No. 9. — June 20, one hundred and twenty-eight large Damson Plums, 

 from Greencastle, Ind., containiug one hundred and thirty-nine egg punctures, placed 

 in vivaria. 



Result of examination September 4 : Fifty-three adults. Dead. 



Experiment No. 10. — June 20, one hundred and sixty-eight Robinson Plums, from 

 Greencastle, Ind., containing two hundred and twenty-three egg punctures, placed iu 

 vivaria. 



Result of examination September 4 : Thirty-five adults. Dead. 



Experiment No. 11. — June 20, one hundred and sixty-eight Mariana Plums, from 

 Greencastle, Ind., containing two hundred and nineteen egg punctures, placed iu vi- 

 varia. 



Result of examination September 3: Fifty-three adults. Dead. 



Experiment No. 12. — June 20, three hundred and thirteen Lombard Plums, from 

 Greencastle, Ind., containing four hundred and sixty-two egg punctures, placed in 

 vivaria. 



Result of examination September 3 : Sixty-five adults. Dead. 



Experiment No. 13. — June 20, ninety-five Yellow Egg Plums, from Greencastle, lud., 

 containiug one huudred and three egg punctures, placed in vivaria. 



Result of examination September 4 : Nineteeu adults. Dead.* 



*Six larvai from this lot were destroyed. 



