38 



BULLETIN 252,, IT, S. DEPARTMENT OF AGRICULTURE. 



Table XXXI. — Length of feeding period of the wintering larvse of the first brood, stock' 

 jar method, Winthrop, Me., 1914 — Continued. 



Number of individuals. 



Date of 



entering 



fruit. 



Length of feeding period in specified days. 



35 36 



37 



38 



40 



41 



46 



3 | 9 



tf| ? 



3 



9 



3 



9 



3 



9 



3 



9 



c? 



? 



2 



July 7 

 July 8 

 July 9 





















4 



2 



















). 







Julv 11 







1 | ! i 



4 July 12 



3 Julv 13 



i 





1 i 1 







i ! i i 



9..- 



July 14 



1 







14 



July 15 

 July 16 

 July 17 

 July 18 

 July 19 

 July 20 

 July 21 

 July 22 

 July 23 

 July 24 

 Julv 25 

 July 26 

 July 28 

 July 29 

 July 31 

 Aug. 1 

 Aug. 2 

 Aug. 3 

 Aug. 4 

 Aug. 5 

 Aug. 6 

 Aug. 8 

 Aug 9 



1 



i ....L... 



1 





9 



(1) 



i 





l 





18 



I 



i 





11. . 





i ! 



19 







; 



1 .... 1 1 



3 







i ! 







20 









l 



1 1 





6 









1 i 





6 









i 



1 





11 



... 



1 









i i 





33 





1 







4 











9 





----"" 



I 1 '1 





10 







| 



19 





1 





i 1 . 



24 





1 



1 



16 





----|---- 



: i 





40 





■II 1 





i 



13 





! 1 1 





-------- 



10 





II 1 



:::::::::::::: 









1 | .J 









10 





1 1 ' ' 











2 





I i | 











341 3 and 9 









2 n 1 2 1 i 1 i 



Oil 



i 



1 



1 



1 



Sex undetermined 



































Total 





3 



2 



2 



J 



J 



1 



2 

































Average length of feeding period, 341 male and female larvse, 25.717 days; 140 male larvae, 23.935 days; 

 176 female larvae, 27.022 days. 



Maximum length of feeding period, 341 male and female larvae, 46 days; 140 male larvae, 46 days; 

 176 female larvae, 46 days. 



Minimum length of' feeding period, 341 male and female larvae, 19 days; 140 male larvae, 19 days; 

 176 female larvae, 19 days. 



Length of the feeding period of vjintering first-brood larvae, (bagged- 

 fruit method). — Table XXXII records the feeding period of 492 win- 

 tering first-brood larvse. The average feeding period of these larvse 

 was 31.865 days; maximum, 55 days; minimum, 24 days. The 

 average feeding period for 226 male larvse was 30.960 days; maxi- 

 mum, 55 days; minimum, 24 days. The average feeding period for 

 213 female larvse was 32.436 days; maximum, 55 days; minimum, 

 25 days. 



