12 



BULLETIN 252, U. S. DEPARTMENT OF AGRICULTURE. 



25.925 days; maximum, 49 days; minimum, 16 days. The average 

 feeding period for 140 male larvae was 24.621 days; maximum, 46 

 days; minimum, 16 days. The average for 207 female larvae was 

 26.371 days; maximum, 44 days; minimum, 19 days. Remainder 

 of larvae — sex undetermined. 



Table X. — Length of feeding period of wintering larvse of the first brood, stock-jar method, 



Winthrop, Me., 1913. 



[Figures in parentheses ( ) denote sex undetermined.] 





Date of 



entering 



fruit. 



Length of feeding period in specified days. 



Number of 

 individuals. 



16 



19 



20 



21 



22 



23 



24 



25 



26 





3 



9 



c? 



9 



s 



9 



s 



9 



c? 



9 



<? 



9 



<? 



9 



d 1 



9 



c? 



9 



4 



July 5 

 July 6 

 July 7 

 July 8 

 July 9 

 July 10 

 July 11 

 July 12 

 July 13 

 July 14 

 July 15 

 July 16 

 July 17 

 July 19 

 July 20 

 July 21 

 July 23 

 July 24 

 July 25 

 July 26 

 July 27 

 July 28 

 July 29 

 July 30 

 July 31 

 Aug. 1 

 Aug. 3 

 Aug. 4 

 Aug. 6 

 Aug. 9 





























1 



3 

 1 

 1 

 2 



4 











8 























1 







2 



"2" 

 .... 



2 



1 



.... 



1 









9 















1 







l 

 l 



1 



(1) 

 2 



2 

 .... 



(i) 

 1 

 3 



i(i) 

 1 





18 

















1 

 1 



2 



"2 



"2 

 1 



*(i) 



1 



10 























1 



39 











1 



l 









3 



1 



4(1) 

 1 

 1 



4 



?, 



13 

















2 



1 



25 

















2 

 2 





3 



"2 

 1 



3(2) 



? 



13.. 















2 

 1 

 3 

 2 



1 

 3 

 1 



.... 



5 

 1 

 2 



1 

 2 



1 

 (1) 

 3 



(1) 



■2 



1 

 2 



1 



13.. 











2 

 3 



"4" 







1 



41 







1 



l 

 l 



2 



2 



?, 



6 









16.. 

















2 



1 

 4 

 1 



3 



2(2) 

 2 

 3 

 3 







1 







22 







1 



"i" 



4 



i 



3 



3(1) 

 2 



"i" 



1 



1 

 1 

 1 

 2 









28 



1 







2 

 1 



.... 



? 



15 











1 



3 



12 





















(1) 3 





13 





















1 



1 





?, 



14 



















i 











11 











(1) 









2 





1 



2 











4 



















1 





1 

 1 



"(2) 

 1 



1 



16 



















i 



2 

 1 



1 

 .... 





1 

 (1) 



2 



1 



■> 



13 











1 





2 

 1 





1 



(1) 



1 



12 













3 







2 

























2 







































3 



















1 











(1) 











2 

































? 



5 































(1) 



1 







1 





























(1) 



98 







390 c? and 9 . . 





1 



n 



2 1 3 



11 1 6 



16 







14 1 21 



15 1 20 



26 



15 



ifi 



9 1 24 



Sex undeterm) 



ned 

















1 



1 





5 



8 



3 



3 







... 











Total 



i 



s 











3fi 









































