16 PROLIFERATION IN CONTROL OF BOLL WEEVIL. 
At Victoria in 1904, from July 1 to October 10, the mean tempera- 
ture averaged 80.6° F., which was 1.17° below the normal. During the 
same period the total rainfall amounted to 8.50 inches, which was only 
0.57 inch below the normal. In a general way this season might be 
described as slightly cooler than usual, with the humidity and rainfall 
practically normal. 
No records are available for Calvert, Tex., but the reports from 
Hearne, which is only 8 miles from Calvert, will serve to indicate the 
temperature and rainfall of the latter place with sufficient accuracy. 
During the months of July and August, 1905, the mean temperature 
averaged 82.85° F., which was 2.8° above the normal. No rain fell 
during September, and during August the rain amounted to only 0.63 
of an inch. For these two months, therefore, the rainfall was 4.33 
inches below the normal. The season may be characterized in general 
as exceptionally hot and dry. At San Antonio the mean temperature 
during these two months averaged 82.5° F., which was 1.6° above the 
normal. During this period the rainfall amounted to 2.31 inches, 
which was 3.35 inches below the normal. Here again the season was 
exceptionally hot and dry. 
Considering these climatic conditions in relation to the figures given 
in Table III, the following conclusions would seem to be indicated: 
(1) The percentage of squares which proliferate from attack by the 
weevil is not greatly affected by varying conditions of temperature and 
moisture; (2) the increase in mortality due to proliferation is not 
greatly affected by the varying climatic conditions as shown for these 
localities; (3) the normal mortality of the weevil which may not be 
attributed to proliferation is decidedly greater during especially hot 
dry weather than it is under cooler and more moist conditions. 
As for bolls, the range in formation of proliferation in locks from 48.2 
to 64.3 per cent is not unexpectedly great. The most remarkable fact 
is that the maximum percentage for locks and the minimum percent- 
age for squares occur at the same time, in the same locality, and with 
the same variety. It is plain, therefore, that climatic conditions can 
not be held responsible for these contradictory results. The records 
concerning percentages of mortality are also too inconsistent to point 
to any constant effect of the climatic conditions upon this particular 
point. The records for ‘‘normal mortality”’ also fail to show any con- 
sistent increase or decrease which may be attributed to exceptional 
conditions of heat or drought. The reason why the records for bolls 
fail to show as consistent conclusions as are indicated for squares may 
probably be found in the comparative difference in the length of the 
growing season for each and in the essential difference in the nature of 
the two sets of organs. Obviously the square would be subject to cli- 
matic changes occurring within only a short period of time as com- 
sea 
hthlasnils Kmiitasishammndtmidaisds adsectcaane eae ee 
