24 PROLIFERATION IN CONTROL OF BOLL WEEVIL. 
Studying Table VII with a view to making a comparison of the 
varieties in regard to their tendency to proliferate in response to egg 
punctures and larval injuries, it appears that, in cases where one hun- 
dred or more observations were made, the highest percentage showing 
proliferation was 67.7 per cent, found in Allen at Calvert, Tex., on 
September 11, 1905. A previous examination of this variety shows, 
however, only 50.4 per cent. which is almost exactly the average per- 
centage found for all varieties. The average of all observations on 
Allen shows 59.3 percent having proliferation. The lowest percentage, 
from observations which are closely comparable, was 33.9 per cent, 
found in Sunflower at Victoria, Tex., in 1904. Unfortunately theré 
are no other observations upon Sunflower by which this result may be 
checked to see whether it may be considered as a somewhat constant 
tendency in that variety. This being true, it would not be safe to 
conclude that Sunflower shows the least tendency to proliferate among 
the varieties examined. It should be noted that the average of the 
three Egyptian varieties grown at Victoria in 1904 is 52.3 per cent, 
which is slightly above the general average for all varieties examined. 
Considering all examinations for each of the four varieties having 
more than 500 observations each, we find for King 53.2 per cent, for 
Territory 52.8 per cent, for Shine 49.7 per cent, and for Native 45.7 
per cent. Because of the larger number of observations made the 
average percentages shown for these four varieties are undoubtedly 
the most reliable of all those given in the table. It appears to the 
writer from the small variation of 7.5 per cent that the tendency of 
different varieties to proliferate in response to weevil injury by ovi- 
position or by larval feeding is a remarkably uniform character. 
Much more extensive examinations would be required to determine 
the positive status of so many varieties in respect to this tendency to 
proliferate. 
SUMMARY OF RECORDS FOR FOUR VARIETIES. 
Examining more closely the portion of Table VII relating to 
mortality, we find that the percentage of mortality in squares with 
proliferation ranges from 0 to 50 per cent. The latter figure is found 
in Triumph at Calvert, August 25, 1905. A general average for the 
4,121 squares examined is 22.3 per cent. For the four varieties— 
Territory, King, Shine, and Native—a closer comparison can be made 
by presenting the figures in tabular form. 
