12 



BULLETIN 252, U. S. DEPARTMENT OF AGRICULTURE. 



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

 feeding period for 140 male larva? 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. Kemainder 

 of larvae — sex undetermined. 



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



Winthrop, Me., 1913. 



[Figures in parentheses ( ) denote sex undetermined.] 



' 





Length of feeding period in specified days. 



Number of 



indiyiduals. 



Date of 



entering 

 fruit. 



16 19 20 



21 



22 23 24 25 



26 



i 



3 



8 > 



9|c?2 



*.|s 



3 



9 



3 



2 



i |? 



3 



9 



3 



9 



4 Jnlv 5 





















1 



3 









8 



July 6 























1 







2 



~~2 

 .... 



2 



1 









9 . 



July 7 

 July 8 

 July 9 















1 







1 

 1 



i 



(1) 



2 



1 

 1 

 2 



4 



2 

 .... 



(1) 

 1 

 3 







13.. 















1 

 1 





2 

 "2 



"¥ 



1 



"(i) 



1 



10 

















1 



39 



July 10 

 July 11 

 July 12 

 Jnlv 13 











1 



1 







3 4(1) 

 1 



4 



9 



13.. 















2 





1 



25 

















2 







l 



3 ---- 



9 



13 













2 

 1 





1 



1 



1 

 (1) 



3 

 (1) 





2 



1 



3,'9) 



1 



13 i July 14 



41 1 July 15 



6. July 16 



16 ; July 17 



22 July 19 



28 July 20 



15 ! July 21 



12 Jnlv 23 











2 

 3 



"~i" 



3 





1 11(1) 



1 1 



1 







1 



1 



1 



3 2 1 1 ! 5 



2 



2 



9 







2 





1 



9 













1 







2 







3 



.... 







1 











1 



i 4 1 1 



3 3m 



.... 



1 



2 



2 1 

 1 4 



1 









1 





1 







1 



2f2V 1 



.... 2 



.... 1 



.... 



9 







........ 



.1 



2 1 2 1 

 (1) 3 3 



3 



13 



July 24 





::::i::::i::::i:::: 



:::::::::: 



1 





3 2 



1 





9 



14 



July 25 

 July 26 

 July 27 

 July 28 

 July 29 

 July 30 

 July 31 

 Aug. 1 









1 











U 







(1) . 



9 1 2 







4 











1 



1 



if 



1 



16 









11.. ! 1 2 1 



9 



13 







1 



.... 



2 .... 



1 .... 



2 i i m m 





1 



12 





. 



1 i 



..:..:..:.. 





3 



.... 





2 















2 









-»--:-- 











3., 



Aug. 3 

 Aug. 4 

 Aug. 6 

 Aug. 9 















1 CD 











2 

















? 





'■ ! __ 



(1) 



1 







1 





(1) 







390 3 and . . 

 Sex undeternu 













1 . | 2 3 11 6 16 1 9 14 1 21 15 . 20 i 26 . 28 ! 15 i 16 



9 



94 



ned 







1 1 





5 8 3 3 









Total 



1 5 18 26 35 40 62 34 36 









