10 
BULLETIN 1225, U. S. DEPARTMENT OF AGRICULTURE. 
Table 1. 
-Incubation period of camphor thrips eggs. 
IN SUMMER. 
Record 
No. 
Date eggs 
were 
deposited. 
Number 
of eggs 
deposited. 
Number of eggs developing in specified number 
of days. 
Number 
of eggs 
failing 
to hatch. 
5 days. 
6 days 
7 days. 
8 days. 
9 days. 
1 
1921. 
Aug. 4 
Aug. 5 
...do 
3 
10 
11 
3 
6 
17 
8 
21 
3 
20 
2 
17 
23 
6 
13 
18 
20 
16 
10 
32 
26 
31 
18 
28 
20 
2 
6 
9 
3 
3 
8 
7 
10 
3 
10 
1 
11 
18 
3 
10 
13 
10 
9 
4 
15 
18 
22 
9 
11 
10 
1 
2 
1 

1 
1 
2 
1 
3 
4.. 
Aug. 6 
...do 
2 
3 
1 
2 
1 
6 
Aug. 7 
...do 
6 
7 
8 
Aug. 8 
...do 
Aug. 9 
...do 
Aug. 10 
...do 
Aug. 11 
...do 
Aug. 12 
Aug. 13 
Aug. 14 
Aug. 15 
Aug. 16 
Aug. 17 
Aug. 18 
Aug. 19 
Aug. 20 
Aug. 21 
6 
3 

9 
10 
1 
9 
1 
2 
3 
1 
11 
12 
4 
2 
2 
3 
3 
5 
5 
6 
15 
1 
7 
4 
9 
3 
13 
14 
15 
16 
2 
5 
2 
17 
18... 
19 
20 
2 
7 
2 
5 
7 
3 
21 
22 
23 
24 
25 
"4 
Total 
382 
78 
225 67 
4 7 
IN WINTER. 
Record 
No. 
Date eggs 
were de- 
posited. 
Number 
of eggs 
de- 
posited. 
Number of eggs developing in specified number of days. 
Number 
of eggs 
failing 
to hatch. 
10 
days. 
11 
days. 
12 
days. 
13 
days. 
14 
days. 
15 
days. 
16 
days. 
1. 
1920. 
Nov. 15 
Nov. 12 
Nov. 17 
Nov. 19 
Nov. 20 
Nov. 23 
...do.... 
Nov. 29 
Dec. 1 
Dec. 3 
Dec. C 
Dec. 9 
Dec. 11 
Dec. 18 
Dec. 20 
Dec. 21 
Dec. 22 
...do.... 
Dec. 23 
Dec. 24 
Dec. 28 
Dec. 29 
Dec. 31 
1921. 
Jan. 1 
Jan. 3 
Jan. 4 
Jan. 5 
Jan. 6 
Jan. 7 
Jan. 8 
. do.... 
9 
4 
2 
3 
2 
8 
4 
6 
4 
1 
1 
1 
2 
1 
1 
2 
2 
3 
2. 
1 
3 
1 

4 
1 
1 
4 
1 
3 
2 

5 
1 
6 
2 
2 
7 
3 
8 
2 
..... 
1 
1 
1 

9 

10 . 
3 
3 
3 
2 
2 
4 
2 
2 
1 1 

11... 
2 

12... . 
1 
1 
2 

13. . 
1 
14.. 
1 
1 
1 
15... 
1 
1 
2 
1 
2 
1 
1 
1 
1 
16 

17... 

18. . 
4 
4 
4 
2 
2 
3 
1 

19. 

20. 

21 
3 
2 
1 
1 
1 

22 
3 
2 
2 
4 
4 
2 
2 
1 
1 
1 
3 
4 
2 
4 
i 
2 
... 

23 


24 
1 

25. 
1 
2 
2 

26. . 
2 
27. 
2 
1 

28. 

29. 

30. 
1 
1 | 
1 


31. 

32. 
Jan. 9 
Jan. 10 
do 
2 

33. 

1 

34 
1 
35... 
Jan. 26 
4 

Total 
113 | 4 1 13 
14 34 
25 
3 
1ft 

