SEASONAL HISTORY. 



51 



SEASONAL PROPORTION OF SEXES. 



The most careful records of the sexes have been made in connec- 

 tion with the hibernation period. The records are presented here- 

 with in tabular form, grouping the specimens as hibernated weevils, 

 reared weevils taken during the spring and summer, and autumn 

 weevils which were about to hibernate: 



Table XVI. — Sex of hibernated boll weevils. 



Year. 



Locality. 



Male. 



Female. 



Number. 



Per cent. 



Number. 



Per cent. 



1902-03 



Victoria, Tex 



Calvert, Tex 



269 



40 



203 



173 



84 



1,668 



948 



1,660 



60.8 

 59.7 

 57.1 

 57.7 

 59.6 

 54.1 

 52.9 

 61.3 



174 



27 



153 



127 



57 



1,412 



846 



1,049 



39.2 



1903-04 



40.3 



1903-04 



Victoria, Tex 



Dallas, Tex 



Victoria, Tex 



Dallas, Tex 



Calvert, Tex 



42.9 



1905-08 . . 



42.3 



1905-06 



40.4 



1906-07 



45.9 



1906-07 



47.1 



1906-07 



Victoria, Tex 



38.7 









Total. 



5,045 





3,845 

















56.8 





43.2 













Table XVII. — Sex of spring and summer reared boll weevils. 



Year. 



Locality. 



Male. 



Female. 



Number. 



Per cent. 



Number. 



Per cent. 



1902 





240 



140 



63 



9 



475 



48.0 

 53.1 

 44.7 

 47.4 

 54.7 



260 

 124 



78 



10 



393 



52.0 



1903 



.. do 



46.9 



1906 



Dallas, Tex 



55.3 



1907 





52. G 



1910 



Tallulah, La 



45.3 









Total 



927 





865 

















51.7 





48.3 













Table XVIII. — Sex of autumn boll weevils ready to enter hibernation. 



Year. 



Male. 



Female. 



Number. 



Per cent. 



Number. 



Per cent. 



1904 



557 

 31 

 63 

 173 

 173 

 19 

 29 



63.7 

 62.0 

 57.7 

 68.9 

 57.7 

 57.6 

 52.7 



317 



19 



127 



78 



127 



14 



26 



36 3 



1904 



38 



1905 , 



42 3 



1906 



31 1 



1906 



42.3 



1906 



42 4 



1906 



47.3 







Total 



1,045 





708 











Weighted average 





60.0 





40 











Total and weighted averagefor all seasons 



7,017 



57.2 



5,418 



42 8 







. 



