PAPERS OX THE COTTOX BOLL WEEVIL, ETC. 



did not begin hibernation until about November IT or 18. This was 

 also true of other weevils under observation in the laboratory. The 

 daily notes concerning one or two of the outdoor cages started in Octo- 

 ber are of interest in this connection. For example, lot 3 comprized 

 100 weevils put in hibernation cage with food October 16. The hiber- 

 nation cages were wooden boxes 2 feet high and 1 foot square, with 

 the sides about one-half open and covered with wire window screening, 

 except the front, which was of glass. In the bottom of each cage was 

 placed plenty of rubbish, consisting of fallen cotton leaves, rotten 

 wood, etc. The weevils were thus exposed to the outside temperature, 

 but were largel\' protected from rain. These cages were placed in 

 various situations in a small grove and pasture at the apiary of the 

 Agricultural and Mechanical College, College Station, Tex. The rec- 

 ords kept of this lot and of lot 2 are as follows: 



October 17, 18, no hibernation, weevils active; October 19, same, quiet in bottom 

 of cage; October 21, sign of hibernation evident, some weevils congregate about dead 

 rubbi.'^h on floor of cage; October 22, 23, 24, similar conditions, some seem to be hiber- 

 nating; October 25, a few more in hibernating attitude; October 26, weevils are 

 undoubtedly hibernating, shown by dormant attitude under rubbish; October 27, 

 about all hibernating — if they were let out they would not hibernate, as some were 

 let out, and they joined those in the field and commenced feeding; Octol^er 29, hot 

 day arouses weevils to activity; October 30, think weevils die at the rate of 1 to 4 per 

 day. 



November 2, warm weather makes them exceedingly active; this continues until 

 the 8th, when cool weather checks their activity; November 15, all weevils dead. 



Lot 2. — One hundred weevils placed in cage October 8 and fed with squares; Octo- 

 ber 9, weevils lively, flying about in cage; October 10, 11, no signs of hibernation; 

 October 12, less active; October 13, those on rubbish dead or dying; October 14, no 

 signs of hibernation; October 18-23, weevils active, no hibernation; October 25, all 

 but 8 dead, those hibernating under rubbish; October 29, weevils active; October 

 29-31, November 1, 2, sluggish; November 5, all dead. 



Table 1. — Percentage of mortality of hibernating weevils. 





Date placed in 

 cage. 





Date hi- 

 bernated. 



To November 18, 1903. 



November 

 18-30, 1903. 



December, 1903. 



g 

 o 



Lot. 





> 



si 

 Q 



6 



> 



< 



Q 



OS 



6 

 > 



< 







si 



5 



1 



1903. 

 October 7 



October 8 



October 16 



October 23 



October 25 



November 1 . . . 

 November 9 . . . 

 November 17 . . 



Average . . . 

 Average . . . 



100 

 100 



100 



100 



300 



200 

 200 

 200 



500 

 600 





Nov. 

 lOct. 

 lOct. 

 INov. 

 iNov. 

 fOct. 

 1Nov. 



Nov. 



1 

 24 

 25 

 3 

 5 

 30 

 15 

 18 



Per 

 ct. 



Per 



ct. 



100.0 





Per 

 ct. 



Per 

 ct. 



Per 

 ct. 



Per 

 ct. 





Per 

 ct. 



Per 

 ct. 









1 















ibo'.o 



50.0 

 93.5 



92.0 



99.0 



100.0 



100.0 





1 









'" '\ 



a2 





1 





















1 















1 











a3 



















Nov. 18 

 ....do... 

 ....do... 





4 









14 



126 

 27 



7 

 67 

 18 

 14 



71 



99 



71 J- 714- 



5 



9.0 



50.0 

 6.5 









33 1 

 82 ;/•■■ 

 61 25 



82 

 61 + 



71 



ad 



23 



50 



50 



11 + 



7 



....do... 

 ....do... 



Nov. 



15 





8 



25 







100 







1 









....do... 













5+7 





8.0 

 21.0 











4,5,6 



....do... 

















75+ 514- 

















i 







a Furnished ^vith squares for food. 



b One to 4 dying per day. 



