20 BULLETIN 1428, U. S. DEPARTMENT OF AGRICULTURE 
Table 2. — Oviposition records of the cadelle — Continued 
Date 
Number of eggs laid by female No. — 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
1923 
Sept. 17 
j 
16 
18 
41 
10 
21 
25 
31. 
27 
| 
23 
Oct. 3 
16 
7 
15 
48 
8 
10 
15 
12 
20 
! 
Total. 
530 
1,190 
436 
1,311 
605 
1,087 
990 
931 
493 
1,319 
987 
1,182 
916 
757 
FREQUENCY OF OVIPOSITION 
The cadelle female does not oviposit with regularity. Eggs may 
be deposited daily or every other day during the period of greatest 
egg-laying activity, although intervals of from 10 to 14 days, more 
or less, when no eggs are laid, frequently occur even during seasons 
of favorable climatic conditions. In Table 2, containing data on the 
opposition of 14 females, there are only six instances in which eggs 
were laid each day for periods of three or four days. Thus No. 2 
deposited 25, 20, 32, and 40 eggs on July 15, 16, 17, and 18, respec- 
tively, 27, 46, 16, and 20 on July 30 and 31 and August 1 and 2, 
respectively, and 36, 34, and 48 eggs on August 19, 20, and 21, respec- 
tively ; No. 4 deposited 20, 42, 44, and 26 eggs on June 4, 5, 6, and 7. 
respectively ; No. 12 deposited 48, 32, and 32 eggs on June 5, 6, and 7. 
respectively; and No. 13 deposited 40, 18, and 24 on July 5, 6, and 
7, respectively. 
Eggs are frequently laid every other day and sometimes every day 
during the height of oviposition activity. Thus No. 2 deposited 8, 40. 
25, 20, 32, 40, 27, 10, 14, 32, 24, 29, 27, 46, 16, 20, 21, 12, 19, and 22 
eggs on July 11, 13, 15, 16, 17, 18. 20, 21, 23, 25, 27, 28, 30, and 31, and 
August 1, 2, 4, 6, 7, and 8, respectively. A more usual record, how- 
ever, is that of No. 10, which deposited 22, 20, 61, 24, 16, 36, 12, 50, 22, 
and 16 eggs on March 1, 3, 6, 9, 12, 16, 18, 22, 28, and 31, respectively. 
Although egg deposition ceases in most instances during October. 
November, December, and January, one female (No. 2) deposited 39. 
52, 15, 23, and 27 eggs on October 3, 5, 7, 10, and 15, respectively, 
before stopping oviposition for the winter period. A study of the 
data of Table 2, in conjunction with other records not included, in- 
dicates an irregularity in oviposition that can not be predicted. 
NUMBER OF EGGS DEPOSITED BY SINGLE FEMALES 
Previous investigators have not determined the egg-laying capacity 
of the cadelle, hence the records given in Table 2 are the first ever 
published of females of known age and with oviposition records 
broken by a period of winter inactivity. The junior writer 
(-5, p. 62-63, nos. 330, 331, 337), in a preliminary report, gave records 
Nos. 1 to 3 occurring in Table 2, which subsequently obtained data 
