14 



BULLETIN" 252, U. S. DEPARTMENT OF AGRICULTURE. 



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

 Winthrop, Me., 1918 — Continued. 





Date of 



entering 



fruit. 



Length of feeding period in specified days. 



Number of 

 indiyi duals. 



36 



37 



38 



39 



40 43 



44 



46 





e 



9 



3 



9 



3 



9 



3 



9 



3 9 



~s 



9 



3 



9 



3 



o 



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 











8 



::::i:::: 



...... 























9 



I 





(i) 



















18 











::::r:::;::: 











10 



i 









" """" 













39 



........ 





(i) 









l 









13 





(1) 









...J i -- 









25 











\ 



i 



1 











13 

















. 











13 



























41 



....j i 









::::::. 





........ 



■ 1 . 











6 















. 1 .. 









: 



16... 































22 



















::...... 













28 































15 



i 































12 



■■"I"" 































13 























.... 











14 



CD 







i 









i 



i 











11 













(1) 













4. .'. . 









■l .... 





'""'!'"*' 













.... 





16 





13 







l 







1 

















12 









i 



! 

















2 



"i 



































. ...... 















3 















:::::::: 













2 









...-.;..: 





















-------- 























1 



■'. ::.. 







! 



































1 1 1 



si 1 it 1 1 



1 i i i it 





1 

















112 1 















2 4 3 2 



1 1 



1 1 1 



1 









Ayerage feeding period, 390 male and female larvse, 25.925 days; 140 male larvse, 24.621 days; 207 female 

 larvse, 26.371 days. 



Maximum feeding period, 390 male and female larvae, 49 days; 140 male larvae, 46 days; 207 female 

 larvae, 44 days. 



Minimum feeding period, 390 male and female larvae, 16 days; 140 male larvse, 16 days; 207 female 

 larvae, 19 days. 



Length of the feeding period of wintering first-brood larvae, {watered 

 stock-jar method). — As shown in Table XI, the average feeding 

 period of 260 male and female larvse was 26.569 days; maximum, 41 

 days; minimum, 19 days. The average for 111 male larvse was 26.3 15 

 days; maximum, 40 days; minimum, 19 days. The average feeding 

 period for 123 female larvae was 26.463 days; maximum, 41 days; 

 minimum, 20 days. Remainder of larvse — sex undetermined. 



