82 



Table XIX. — Activity of Jive lueevils in different parts of the day. 



Date. 



Period. 



2 



Cij 



t-l 



a, 

 S 



r 



be 



bo 

 •S 



Is 



Condition of 

 weevil at end 

 of period. 



Remarks. 



1903. 

 Sept. 2 



Bept. 2-3... 



Sept. 3 



Do 



Do 



2. 30 to 6 p.m. 



93-80 



80-69 



69-85 



85-95 

 95-84 



84-68 



68-83 



83-91 

 91-82 

 82-79 



16 

 3 



12 



18 

 12 



3 



4 



24 

 11 



5 



15 



1 



10 



15 

 11 



1 



1 



19 

 8 

 



10 

 2 



2 



10 

 6 



3 



4 



12 

 5 

 6 



Placed on fresh 



plant. 

 All resting 



All active 





6 p.m. to a. m 



6. 15 to 10. 15 a. m 



10 40a.m.to2.40p.m. 

 3 to 6. 30 p. m 



Punctures black 



at 6 a.m. 

 3 trying to escape; 



cage moved. 

 Cage moved. 



do 



Placed on fresh 



plant. - 

 All resting 



3 moving to ad- 

 jacent squares. 

 All active. 

 All quiet. 

 All feeding 



Sept. 3-4 .. . 



Sept. 4 



Do 



Do . 



6. 30 p.m. to 6 a. m 



6. 30 to 10 a. m 



10 a.m. to 4 p. m 



4 to 6 p, m 



Feeding punc- 

 tures all black; 

 small square 

 flared. 



Sept. 4-5... 



6 p.m. to 9 a. m 



Total 



Cloudy; every 

 weevil on same 

 square as at 6 

 p.m. 





108 



81 



60 













An examination of these figures shows that weevil activity began 

 and ceased at about 75° F. Activity increased as the temperature 

 rose, and its maximum coincided with the maximum of daily tern- 



FAHREN- 

 HEIT 



TIME 





I2p lAM 2 3 4 5 6 7 8 9 10 11 I2m IPM 2 3 4 5 6 7 8 9 10 II 12 



3 



100° 

 95° 

 90° 

 85° 

 80° 

 75° 

 70° 

 65° 

 60° 



















































































• ^e 



pU 



''l^y 













































'di* 



0^ 



"^•^^ 





■^ 



NSr 









































tf^ 



<y 











\ 



\\^. 





































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r^ 



^ 





























A 



0^ 



V 



















V 



^ 

























To} 



jf nt 



zr^ 



>y 





\ 



av 



>ra 



jei. 



CcL 



uu 



'yo, 



ffu 





fem 



oA 



' IV 



-^ev 



'J7 



' — 



































n d 



epL 



em 



bei 



■J. 



t&. 



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Wo 



















































































































Fig. 3.— Diagram showing average activity of five female weevils (original). 



perature. It then decreased with the falling temperature until it 

 ceased entirely some time during the evening, probably at about 

 75° F. * (See fig. 3.) Feeding continued at lower temperatures than 

 oviposition, as is known to be the case during the late fall. 



Examinations made in the field between 6 and 7 a. m. on Septem- 

 ber 4 showed that all weevils, both males and females, were quietly 



