43 
from counts made by Mr. G. H. Harris, and the other from Pomona, 
Ga., from counts made by Mr. Mark Riegel. In each case twenty 
plants were examined at an observation, and, as the corn had been 
planted at regular intervals, plants in fresh silk could be chosen in 
most cases. 
Table VI. — Comparative oviposition on corn throughout the season. 
CALVERT, TEX. 
Date. 
1903. 
Mav4.... 
May 26... 
May 29... 
June 3... 
June 5... 
June 10.. 
1903. 
May 30... 
June 6 ... 
June 13.. 
June 20.. 
June 27.. 
Number 
eggs per 
plant. 
0.66 
.00 
.00 
.00 
1.40 
.40 
Date. 
1903. 
June 17. 
June 24. 
Julvl... 
July 15.. 
July 18.. 
July 22.. 
Number 
eggs per 
plant. 
0.25 
.65 
1.25 
10.30 
.75 
7.00 
Date. 
1903. 
July 29... 
Aug. 5 . . . 
Aug. 12.. 
Aug. 19 - . 
Aug. m . . 
Sept. 2... 
Number 
eggs per 
plant. 
23.50 
1.80 
42.00 
15.60 
2.75 
25.25 
Date. 
1903 
Sept. 9 . . 
Sept. 16 . 
Sept. 23 . 
Oct. 3... 
Oct. 7... 
Oct. 14., 
1903. 
Sept. 12. 
Sept. 19. 
Sept. 26 . 
Oct. 10.. 
Oct. 24.. 
Number 
eggs per 
plant. 
11.80 
4.90 
2.20 
1.10 
.55 
.50 
POMONA, GA. 
1.15 
2.90 
.35 
.55 
2.45 
1903. 
I July 4... 
, July 11.. 
July 18.. 
j July 25.. 
I Aug. 1 . . 
20.40 
7.60 
5.50 
2.30 
1.65 
1903. 
Aug. 8 . . 
Aug. 15 . 
Aug. 22 . 
Aug. 29 . 
Sept. 5. . 
1.45 
2.60 
18. 20 
14.30 
16.90 
9.35 
8.85 
6.60 
5.10 
.60 
These tables are quite irregular and do not show the dates of maxi- 
mum oviposition for each generation as well as might be hoped, but 
the data therefrom will be referred to later, in their bearing on the 
number of generations during the season. No doubt a great propor- 
tion of these discrepancies are due to local weather conditions and to 
the variable maturity of the corn plants at the time the eggs were 
counted. 
For comparison with Table V another one, compiled from records 
made by Mr. C. R. Jones in the season of 1904, is given herewith: 
Table VII. — Oviposition on corn in silk, Texas, 1904. 
Date. 
i904. 
July 
15 
July 
24 
July 
26 
July 
30 
Aug. 
11 
Aug. 
16 
Aug. 
19 
Locality. 
Wharton, Tex 
Grossbeck, Tex,... 
Gilmer, Tex 
Quinlan, Tex 
Ben Franklin, Tex 
Paris, Tex 
Quinlan, Tex 
Condition. 
Silking 
5 feet; no silks... 
Silking 
Tasseling 
Silking 
do 
do 
Eggs on— 
259 
16 
5 
14 
77 
36 
11 
1,053 
'""85" 
456 
338 
265 
14 


22 
137 
148 
60 
2,249 
113 
105 
547 
1,256 
989 
678 
89.9 
4.52 
4.2 
10.94 
62.8 
98.9 
23.1 
