130 



In relation to the general direction of the wind for each month, the 

 movement seemed to be eastward across the wind, which was blowing 

 from the south and southeast. 



A study of the temperature conditions prevailing at 9 points, rang- 

 ing between Cameron and Shreveport, La., shows that during the 

 period of migratory movement the mean average temperature ranged 



A RKANSA S 



LOyOSQAff^/^ 



[I P/fOS/iBL Y £>U/?/A/G , 



^^^^ 



Q^ 



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Fig 5.— Map sliowing successive weevil movements into Louisiana (original). 



between 75 and 81^ F. The general outlines of the various movements 

 are shown and explained in figure 5. 



EFFECT OF DEFOLIATION UPON WEEVIL MOVEMENT. 



During the past autumn special attention was given to this subject. 

 Fields under observation were stripped three or four times in numer- 

 ous cases by the cotton leaf worm Alabama argillacea Hbn. In such 



