18 



BULLETIN 344, U. S. DEPARTMENT OF AGRICULTURE. 



Table VI. — Developmental period of Anthonomus grandis thurberiae in cotton squares, 

 Arizona, 1914; eggs deposited after Sept. 1. 





Date 



adults 



emerged. 



Males. 



Females. 



Adult emerged but 

 date not noted. 





Date 

 eggs de- 

 posited. 



-a 



o 



"a 



CO CO 



a£ 



CO >> 



f 9 



•6 



Ph 



S> CO 



pa 



as 



> CO 

 CO t>> 



f- 3 



Stages found upon 

 examination of 

 squares. 



Sept. 1 

 2 





Days. 







Days. 





























11 





















12 

















3 males and 2 fe- 

 males. 





16 



















17 



Oct. 3 

 Oct. 21 



18 

 32 



2 

 1 



36 

 32 



18 



i 



18 







19 







21 









2 males and 3 fe- 

 males. 



1 male and 2 fe- 

 males. 



4 males and 1 fe- 

 male. 



1 male and 2 fe- 

 males. 





23 



















29 

 Oct. 1 



Oct. 21 

 ...do 

 Oct. 22 



22 

 20 

 19 



2 

 1 

 1 



44 

 20 

 19 



22 



2 



44 





3 











5 









2 males and 4 fe- 

 males. 



2 males and 1 fe- 

 male. 



1 male and 1 female 





7 

















male dead. 



9 



















12 



















14 

















2 males and 3 fe- 

 males. 





16 

















male alive. 



19 

















1 male and 1 female 





21 

















1 teneral male, 4 



23 



















pupae, and 1 lar- 

 va alive. 

 2 pupae and 1 larva 

 aliv"e in cells 

 Nov. 9. 



1 pupa and 3 larvae 

 alive in cells 

 Nov. 9. 



2 larvae alive in 



26 



















28 



















31 



















cells Nov. 9. 



Nov. 2 



















cells Nov. 9. 

 2 larvae alive in 





















cells Nov. 9. 



Total.., 





7 



151 

 21.5 





3 



62 

 20.6 





Averag 

























Total weevils of 



10 

 21.3 





both sexes. 

 Average neriod. 







both 



sexes. 



















In the examination of these squares a great number of the non- 

 producing ones were found to have the contents more or less eaten 

 by weevil larvae. These larvae were evidently unable to survive 

 upon this food. Of course the larval mortality is quite high in any 

 breeding series of either grandis or thurberiae regardless of the food, 

 but this is certainly higher than usual. 



IN COTTON BOLLS. 



The developmental period of the weevil in cotton bolls was studied 

 in the same manner as that just described for cotton squares. The 

 results of this series are given in Table VII. 



