48 



Tin: MEXICAN COTTON-BOLT. WEEVIL. 



after emergence is 130 days for males at Dallas. Tex. (1907), and 118 

 days for females at Calvert, Tex. (1907). The maximum recorded 

 length of life of hibernated weevils unfed after emergence is 90 days 



for males and ss days For females, both records being made at Dallas 

 in 1907. 



A considerable number of records are available to illustrate the 

 relative sustaining power of the various kinds of weevil food. (See 

 Table XIII.) These records are especially valuable in making com- 

 parisons with the sustaining power of other plants suspected of being 

 possible food plants. It will be noticed that the same food has vary- 

 ing sustaining power at different seasons. 



Table X 111. 



'.i RATION 01 I Ml. "I REARED BOLL WEEVILS WTTHOU1 NORMAL POOD, 



Season. 



Sustenance provided. 



Nuni- 



Ikt of 



weevils. 



Number 



of weevil 



days. 



A.V6T- 



Maxi- 

 mum 

 lon- 

 gevity. 





Hay 



1< 

 1.-, 

 10 



47. 7 

 44.9 



- 



2.9 



3.4 



7 



Do 



Outs 



7 



Do 



Corn 



5 











120.0 



2.9 



7 



with grain. 



Tie vine 





Julv 



5 

 2 

 5 

 3 



5 



15 

 6 



1.. 

 10 

 17 

 18 

 19 



3 



3 



3.2 



3.3 



3.4 



3.6 



3.8 



3 



May 



Hibiscus leaf 



3 



Julv 





4 



May 



kra leal 



4 



July 





4 



Do 







Do 





- 











30 



72 



101 



339.8 

 300. 3 



3.3 





weed leaves. 



Water 







4.3 



4.2 



9 





.... do 



11 











151 



046.5 



4.2S 



11 



water only. 









12 

 9 

 42 

 16 

 3 

 6 

 10 

 42 

 18 



25 

 19 

 235 

 92 

 18 

 36 

 7s 

 305 

 (S6 



2.0 

 2.1 

 5.6 

 • 7 

 6.0 

 6.0 



1 I 

 27.0 



3 





do 



4 



Julv 





11 







14 



July 







Do 



Hibiscus moschcutos buds 



8 





10 







ID 



iber-November 



do 







158 



1,294 



8.1 



43 



malvaeeous buds. 



Fresh sorghum cane... .... 





September 



17 



- 



193 



11.3 



20 



< >ctober-November — hibernation 



45 



quarters oi; 







DURATION OF LIFE (AFTER EM] OF HIBERNATED WEEVILS WITHOl 1' 



NORMAL FOOD. 



Juni'-Julv 





13 

 14 



32.5 



2.5 

 3.2 



4 



Do 





4 











27 



:,.7ui 



77.7 



2.8 

 10.3 



4 



without v. . 



March-May 



Water 



90 









This weevil then entered hibernation and remained therein 126 days. 



