BIOLOGY OF THE MEXICAN COTTON BOLL WEEVIL. 29 
and all fruit in which eggs had been deposited was recorded and 
removed from the jar. The records of the experiment are presented 
in Table XV. A total of 49 eggs were deposited in upland squares 
compared with 17 eggs deposited in sea-island cotton squares. Eggs 
were deposited in six sea-island bolls, but in none of the upland 
cotton bolls. 
TABLE XV.—Preference shown by females of the boll weevil in locations for ovi- 
position on sea-island and upland cotton, Madison, Fla., 1918. 
Eggs in— 
Date. 
Upland| 8, | upland} , 5° 
19 island island 
squares. | quares.| Pols. | polls, 
lbp sbacoacee 0 0 0 3 
JullyalSeees octoee 0 0 0 1 
Tulyel 9S ae eee 5 0 0 2 
ilk; DOs saseea, 3 0 0 0 
Dliya2 ee 9 4 0 0 
ditil\, Pe coca sooss 3 2 0 0 
UN? PB}. cadaacase 6 3 0 0 
Tulygo see oan 2 2 0 0 
dhwihy isc ceceooue 4 3 0 0 
Tul yp 265 eee 5 0 0 0 
Uiuliya2 es ee 3 1 0 0 
Uily729 eee eee. 4 2 0 0 
Duly Bier asso 5 0 0 0 
| 
Total 49 17 0 6 
COMPARISON OF THE NUMBER OF BOLL WEEVILS THAT EMERGE FROM UPLAND 
AND SEA-ISLAND SQUARES AND BOLLS. 
The writer placed 4,000 upland squares in a large wire-screen cage 
on August 26, 1918. The squares were carefully examined to deter- 
mine whether each square was punctured and large enough to sup- 
port the developing weevil larva. Similarly, 4,000 sea-island squares 
were put up on the same date. 
From the 4,000 upland squares 1,476 adult weevils emerged soon 
after the squares were placed in the large cage, or a percentage of 
36.9. From the sea-island squares 1,979 weevils, or a percentage 
of 49.4, emerged. 
One thousand five hundred upland and 1,500 sea-island bolls were 
placed in a large wire-screen cage on September 1, 1918, to determine 
- whether more weevils would hatch from sea-island than from upland 
bolls. It is shown in Plate I that there is a decided difference in 
structure between the two types of bolls, the sea-island being oblong, 
with a soft and oily texture. One hundred weevils hatched from the 
upland bolls compared to 650 weevils from the sea-island-cotton bolls. 
From the records secured at Madison, Fla., during 1918, it ap- 
peared that the majority of egg punctures in sea-island bolls pro- 
duced adult boll weevils. It not infrequently happened that as many 
as from four to eight weevil larvee would complete their life cycle 
in a single boll. 
