82 



Table XIX. — Activity of five weevils in different parts of the day. 



Date. 



Period. 



d 



a 



03 



Eh 



32 



3 . 



CO <V> 



Oil 



bo 



SO 



o 



"o o 



t-l 



o o 



a ft 



pi 

 to 



bn 



£ . 



O <0 



°o 



p 



pi 



Condition of 



weevil at end 

 of period. 



Remarks. 



1903. 

 Sept. 2 



Sept. 2-3 . . . 



Sept. 3 



Do 



Do 



2. 30 to 6 p. m 



°F. 

 93-80 



£0-69 



69-S5 



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 



.? 



6 p.m. to 6 a.m 



G.15 to 10. 15 a. m 



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

 3 to 6. 30 p. m 



Pancturea 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 



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 1 ah 2 3 4 5 6 7 8 9 10 II 12m 1pm 2 3 4 5 6 7 8 9 10 1! 12 p 



100° 

 95° 

 90° 

 85° 

 80 c 

 75° 

 70° 

 65° 

 60° 



















































































fe 



ptt 



<m 













































.•<jj 



. fit 



^ 





^ 











































~s> 



^y 













<M f : 





































&/ 



/ / 

















^ 



? 































^ 























*^ 























r 





*<a 



^•> 





\ 



du 



V'CU 



-H>L 



"icttlSU 



y? 



m 



04 



Gen 



a/> 



' w 



?ev 



il7 



















^L/_. 



















W7> 



epi 



em 



bei 



3, 



4 &i 



>,/, 



903 



















































































































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 



