SPRAYING PEACHES. 19 
TABLE II.—Combined weekly egg-laying records of the plum curculio for various localities 
and the percentage of eggs deposited within two, four, six, and eight weeks from con- 
Jinement—Continued 
eecrae Percentage of total eggs deposited 
Total Number of eggs per individual. reentes by end Race P 
. num- t 
aud ae | Ss d | Fourth Sixth | Eighth 
of eggs. - ani Secon Four Six ig 
Maximum. Minimum. | Average. week. week. week. week. 
College Park, Md....| 2,471 436 62 274. 56 50. 83 91.02 93. 81 
Youngstown, N. Y..| 1,294 257 72 161.75 29. 21 89. 40 97.53 
North East, Pa..... 787 122 48 78. 70 33. 55 83. 48 94.17 
Washington, D.C...| 1,224 557 126 306. 00 36. 36 87.91 96. 24 
Mirtle; Gao 2s. =. 688 154 1 76. 44 17. 44 68. 31 81.10 
Siloam Springs, Ark.| 4,724 388 d 162. 97 11.73 57.88 76. 63 
Douglas, Mich.......| 1,414 201 25 78. 56 23. 41 99.08 | 100.00 
UNM ga ob el | LEO: WER AA ees Se Se ee ete ce te SACs ats a Reno Meee pane esemcac 
Average for all 
IeAHES 5 Salles eoencc|acopaocespcy| Heaceecsneee 144.85 26. 57 56.79 77.32 88.01 
| 
At College Park, Md., the greatest number deposited by any one 
female was 426 and the minimum 62, with an average of 274.56 eggs 
for the individuals under observation. At Youngstown, N. Y., the 
maximum is 257 and the minimum 72, with an average of 161.75 
eggs. At Washington, D. C., under laboratory conditions,.a single 
individual deposited 557 eggs, which is the highest of all records thus 
far obtained for this insect; the lowest number deposited was 126 
and the average for the 4 beetles under observation was 306. At 
Myrtle, Ga., this range was from 154 as a maximum to a minimum of 
1, with an average of 76.44 per individual. At Siloam Springs, Ark., 
the records include an unusually large number of eggs, namely, 
4,724, from 29 beetles. These records show a maximum of 388 and a 
minimum of 4 eggs, with an average for all pairs of 162.97 eggs. At 
Douglas, Mich., the records show a range from 201 to 25, with an 
average for the 18 individuals of 78.56 eggs. The final average 
number of eggs per female for all localities above mentioned is 
144.85, with a range of from 1 to 557. 
As shown under the heading ‘‘Percentage of total eggs deposited 
by end of second, fourth, sixth, and eighth week,”’ the proportion 
deposited by a given time varies for the different localities. There is, 
however, a general agreement in that the great majority of the eggs 
have been placed by the end of eight weeks. Approximately, one- 
fourth of the total eggs are deposited during the first two weeks; 
one-half have been deposited by the close of the first month; three- 
fourths within six weeks; and about 88 per cent of the total within 
eight weeks after the oviposition begins. 
Time spent in the fruit.—Records of the time spent in the fruit as 
the egg and larva have been determined for many individuals and in 
various localities, including Illinois, District of Columbia, western 
New York, Georgia, Arkansas, and Michigan. 
440 
