EMERGENCE FROM HIBERNATION. L90* 



67 



succeeded in escaping. Undoubtedly part of these had left their 

 cells in the bolls after they were buried, as it is verj likely that the 

 burial of the bolls in moist soil may soften the hulls so as to enable 

 the weevils to escape through them as readily as though they remained 

 dry upon the surface of the ground. 



A<Ti\in i\ THE FIELD DURING NORMAL HIBERNATION PERIOD. 



For a number of years it has been known that, in southern Texas 

 especially, weevils may frequently be round moving actively in the 

 field during the winter. I>ut the observations made during the season 

 of 1906 7 extended the range <>( such occasional activity even in 

 nort hern Texas. 



Table XXXIII. Outdoor activity ? during winter q/ 



ility. 



Weevils 

 found. 



Sprout 

 plains 

 exam- 

 ined. 



Remarks. 



Dallas, Tex 



L907. 



Jan. 1 

 Jan. 11 



1 

 1 

 1 



l 

 2 



9 

 10 



9 

 20 



7 

 1 



2 

 1 



1 

 1 



:; 





Found on awning rope. 



Found on window screen; temperature 74° F. 



Do 





Do Feb. 12 





Found en outside of hibernating cage; tempera- 

 ture i 

 Do. 



College Station 



Feb. 22 

 Jan. 17 



L906. 

 Dec 29 



...do 



L907. 

 Jan. 8 



Jan. 9 

 Jan. 12 

 Jan. 16 



...do 



Jan. 17 

 Jan. is 

 Feb. n 





Do 











When given sprouts, all were feeding in 80 min- 

 utes; temperature sl> i\ 



When given sprout-, all were feeding in 45 min- 

 ute : temperature 82° F. 



Mean temperature, January I 8, =67.76° F. 

 i m black land. 



io weevils in bolls on the same plant. 



Upland sprouts not killed as in bottoms. 

 Very dry tor sproul grow th. 



Do. 





Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 







(«) 

 (») 



6 



50 

 30 



8 

 17 

 '_':, 

 50 



1 '■ '..id not kept, though plants wore examined, 

 on si\ farms examined. 



From the Victoria records it appears that between January 8 and 

 February 21, at a time when weevils should normally have been in 

 complete hibernation, 18 adults were found feeding on about 200 

 sproul plants. This record is unique for the United States, and a 

 similar activity in the held may not be duplicated except under very 

 rare condit ion-. 



EMERGENCE FROM HIBERNATION, 1907. 



A- is plainly shown by figures 3 to :>. the actual period of general 

 emergence from hibernation began in each locality about February 20. 

 A- has been previously stated, the actual date of the beginning of 

 emergence can not In- positively given. It can he better expressed 

 as a period of "beginning emergence," and for this reason this period 

 seems to lie between February 20 and March 1. Owing to the excep- 



