16 



BULLETIN 252, IT. S. DEPARTMENT OP AGRICULTURE. 



Table XI. — Length of feeding period of wintering larvse of the first brood, watered stock- 

 jar method,, Winthrop, Me., 1913 — Continued. 





Date of 



entering 



fruit. 



Length of feeding period in specified days. 



Number of individuals. 



34 



35 



36 



37 



38 



40 



41 





3 



9 



(? 



9 



t? 



9 



<? 



9 



<? 



9 



c? 



9 



c7 



2 



4 



July 7 

 July 8 

 July 9 

 July 10 

 July 11 

 July 12 

 July 13 

 July 14 

 July 15 

 July 16 

 July 17 

 July 18 

 July 20 

 July 21 

 July 22 

 July 23 

 July 24 

 July 25 

 July 26 

 July 27 































17 







1 















i 











16 



1 

















1 









11 



























13 





























26 



























10 























1 1 1"" 



12. . 

























19 





















1 





17 





















1 ! 1 





18... 













l 





l 





1 









1 



9 





















18 



























15 































8 































15 



2 





1 

















(1) 









15 























7 































7 































3 































260 S and 9 



3l.... 



9 



— 







1 







i 



....1 2 



1 |........ 



i 

















Sex undetermined 













1 



* 















Total 



3 



2 



] 



] 



2 



2 



] 

































Average length of feeding period, 260 male and female larvse, 26.569 days; 111 male larvse, 26.315 days; 

 123 female larvse, 26.463 days. 



Maximum length of feeding period, 260 male and female larvse, 41 days; 111 male larvse, 40 days; 123 

 female larvse, 41 days. 



Minimum length of feeding period, 260 male and female larvse, 19 days; 111 male larvse, 19 days; 123 

 female larvse, 20 days. 



Length of the feeding period of wintering first-brood larvse, (fagged- 

 fruit method). — Table XII shows that the average feeding period of 

 236 male and female larvse was 32.572 days; maximum, 49 days; 

 minimum, 19 days. The average for 93 male larvse was 29.182 

 days; maximum, 49 days; minimum, 24 days. The average for 126 

 female larvse was 35.492 days; maximum, 46 days; minimum, 19 

 days. The sex of the remainder of the larvse was undetermined. 



