307 



Experiment No. 14.— June 24, one hundred and seventy-six Wild Plums, from woods 

 in Knox County, Ind., containing two hundred and twenty egg punctures, placed in 

 vivaria. 



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



Experiment No. 15. — June 24, fifty-nine Lombard Plums, from Knox County, Ind., 

 containing seventy-nine egg punctures, placed in vivaria. 



Result of examination September 4: Fifty -one adults. Mostly dead. 



Experiment No. 16. — June 24, one hundred and ninety-one Blue Damsom Plums^ 

 from Knox County, Ind., containing two hundred and twenty-six egg punctures, 

 placed in vivaria. 



Result of examination September 4: Seventy-six adults. Few alive. 



Experiment No. 17.* — June 25, fifty-three Apples, from Princeton, Ind., containing 

 sixty-two egg punctures, placed in vivaria. 



Result of examination September 6: Five adults. Living. 



Experiment No. lb.* — June 25, fifty-four Apples, from same tree as No. 17, contain- 

 ing sixty egg punctures, placed iu vivaria. 



Result of examination September 6 : Nothing. 



Experiment No. 19.* — June 25, twenty-nine Apples, from same orchard as No. 17, 

 containing thirty-six egg punctures, but from another tree, placed in vivaria. 



Result of examination September 6 : Three adults. All living. 



Experiment No. 20. — June 26, forty-seven Nectarines, from same tree as Experiment 

 No. 4, and containing forty-eight egg punctures, placed in vivaria. 



Result of examination September 4 : Six adults. Living. 



Experiment No. 21. — June 26, ninety Blue Damson Plums, from E. Yenowine, 

 Edwardsville, Ind., containing one hundred and twenty-five egg punctures, placed in 

 vivaria. 



Result of examination September 4 : Ten adults. Dead. 



Experiment No. 22.— July 12, twenty large Damson Plums, from isolated tree in 

 garden of Hon. E. H. Scott, La Porte, Ind., containing sixty-five egg punctures, 

 placed in vivaria.t 



Result of examination August 13, 14, 16 : Twenty adults. All living. 



* Summary of experiments. 



Varieties of fruits. 



Large Daraaon 

 Blue Damson . 

 Yellow Egg . . 



Lombard 



Coe's Golden . 

 Nectarines .., 

 "Wild Goose . .. 



Mariana . 



Kansas Sand . 

 Chickasaw ... 



Wild 



Robinson 



Apples 



No. of 

 specimens. 



148 



281 



95 



272 



225 



220 



518 



218 



14 



24 



176 



168 



136 



No. of 



Adults 



punctures. 



reared. 



204 



73 



351 



86 



103 



19 



541 



116 



611 



119 



588 



59 



885 



219 



305 



67 



14 



4 



24 



5 



220 



35 



223 



35 



158 



8 



Ratio per 

 specimen. 



2.02 

 3.26 

 5.00 

 2.34 

 1.98 

 3.72 

 2.36 

 3.25 

 3.50 

 4.80 

 5.02 

 4.80 

 17.00 



Ratio per 

 puncture. 



2.79 

 4.08 

 5.42 

 4. 16 

 5.13 

 9.96 

 4.04 

 4.55 

 3.50 

 4.80 

 6.27 

 6.36 

 19.62 



As will be observed, the greatest mortality to eggs and larvae between 

 the time of oviposition and the batching of the adult occurred in the 

 Wild and Robiusou varieties of plums. Also that the apples used this 



*A number of plum trees were growing in tbe immediate vicinity, but I could not 

 get enougb fallen plums for experiment. 



t Tbe top was so covered with a cone-shaped screen that the adults could be observed 

 as soon as they emerged from the ground. 



