108 
BULLETIN" 1476, U. S. DEPARTMENT OF AGRICULTURE 
Table 34. — Total number of eggs deposited by -first-generation Pyrausta nubilali 
females in New England 
Number 
of fe- 
males 
under ob- 
servation 
Average 
total eggs 
per 
female 
Maxi- 
mum 
total eggs 
per 
female 
Mini- 
mum 
total eggs 
per 
female 
First generation of — 
1918 
17 
109 
93 
37 
439 
378 
487 
562 
903 
828 
874 
1,934 
53 
1919 
72 
1920 
52 
1921 
44 
TotaL 
256 
Average..- . !____ _"' -.. 
448 
Table 35. — Total number of eggs deposited by second-generation Pyrausta 
nubilalis females in New England 
Number 
of females 
under 
observa- 
tion 
Average 
total eggs 
per 
female 
Maxi- 
mum 
total eggs 
per 
female 
Mini- 
mum 
total eggs 
per 
female 
Second generation of— 
1917-18 
11 
69 
121 
17 
344 
335 
358 
271 
724 
1,192 
895 
. 465 
107 
1918-19 __ 
43 
1919-20 
55 
1920-21 . 
4 
Total »__. 
218 
344 
The average, maximum, and minimum number of eggs which 
were deposited by the females of P. nubilalis in the one-generation 
areas when confined in lantern-globe cages at Silver Creek, N. Y., 
and Sandusky, Ohio, during 1923 and 1924, are shown in Table 36. 
Table 36. — Total number of eggs deposited by Pyrausta nubilalis females at 
Silver Creek, N. Y., and Sandusky, Ohio (one generation) 
Place 
Year 
Total 
females 
in ex- 
peri- 
ment 
Total 
eggs de- 
posited 
Average 
total eggs 
per 
female 
Maxi- 
mum 
total eggs 
per 
female 
Mini- 
mum 
total 
eggs 
per 
female 
Silver Creek, N. Y 
1923 
1924 
1923 
1924 
50 
50 
25 
50 
. 10,900 
17, 714 
8,056 
29, 250 
218 
354 
322 
585 
1,000 
1,061 
694 
1,075 
12 
Do 
12 
Sandusky, Ohio __•____ J_______ . 
26 
Do 
2 
The averages shown in Table 36 were computed from the number 
of females in the experiment. In the Silver Creek experiments 11 
females in the 1923 series and 8 females in the 1924 series did not 
deposit eggs. In the Sandusky experiments 1 female in the 1923 
series and 3 females in the 1924 series did not deposit eggs. 
NUMBER OF EGGS PER CLUSTER 
The majority of the egg clusters collected in the field in New 
England have contained from 15 to 20 eggs, although the number of 
