109 



tance of about 60 feet. Upon the following- day weevil B was found 

 dead, while weevil A was yet alive and active. 



In making field observations, four series of weevils were used, each 

 series being distinctly marked for recognition at subsequent observa- 

 tions. These series were liberated at intervals between April 16 and 

 May 14. At each time it was certain that large numbers of hiber- 

 nated weevils were emerging. The distance from cotton at which the 

 liberation of the various series took place ranged from 125 to about 

 600 yards. No other cotton fields were in the vicinity. Most of the 

 weevils were liberated south of the field under observation, in the 

 midst of a considerable area of grass land, so that no obstacles could 

 be expected to interfere with their movement back to the cotton field. 

 As the general direction of the prevailing breeze was from the south, 

 the weevils had the advantage of this factor in their movement. 



Table 



XXVII. 



—Flight of hibernated weevils to food. 



Date of liberation. 



Number 

 of wee- 

 vils in 

 series. 



Distance and direction of libera- 

 tions from cotton field. 



Results. 



1904. 

 April 16 



50 

 f 10 



I io 



f 10 



\ 15 



25 











1 n 





100 yards southwest 







1 







I n 











J 



Do 











next 12 days. 





120 











Upon the liberation of these weevils general observations were made 

 as to the height and distance of the initial flight. It was found that 

 when the breeze was quite strong the weevils were very unwilling to 

 to take wing, and could be induced to do so only when sheltered from 

 the breeze. At such times their flights were very short. The weevils 

 started from near the surface of the ground, flying at an average height 

 of about 2£ feet, and in the initial flight covering an average distance 

 of 13 feet. Out of 120 weevils liberated, only 4, or 3^ per cent, were 

 ever seen upon the cotton under examination, which constituted the 

 nearest possible food supply for those weevils. In the case of these 4 

 weevils it was found that they averaged to cover a distance of 500 feet 

 in four days. Doubtless nearly if not quite all of the remainder per- 

 ished without reaching food. Though observations upon the area of 

 seppa cotton were continued for about 3 weeks after the liberation of 

 the last series of weevils, no additional specimens were found after the 

 twelfth day, two of the weevils reaching the cotton in 3 days. 



GRADUAL ATTRACTION OF HIBERNATED WEEVILS TO SQUARES. 



Beginning early in the spring of 1904 a large series of observations 

 was undertaken to determine the general movement of hibernated 



