I 
24G BioHoinics of Pediculus 
TABLE X. Fertility of Pediculus capitis. 
Insects in the second larval skin were taken from a stock box and reared until maturity in separate boxes. 
Opportunity for feeding was given each night (approximately 7 hours). Owing to the early death of the 
indicated by the figures 1, 2, 3, 4 in the first column. ^ No. 1 matured on the 5th January and died on the 
on the 25th January and died on the 9th February, life 15 days. The last (J No. 4 matured on the 9th February j 
capacity of an unfertilized $. Eggs laid before the introduction of a (J are italicised. The boxes containing 
1 lit 
lit: 
Refer- Refer- Days counting from tlie maturity of the $ to that on which the eggs 
ence 
number 
of 
ence 
n umber 
of ? 
Date 
when $ 
matured 
Date when 
tlie S was 
added 
Copulation 
observed 
Date of 
removal 
of the 
CO 
'C 
a 
'C 
CO 
JZ 
CO 
o 
10th 
JZ 
12th 
CO 
14th 1 
15th 
loth 
JZ 
<55 
JZ 
o 
No. 2 
1 
4. I. 10 
17. I. 10 
— 
— 
- 
/ 
2 
3 
2 
5 
2 
4 
2 
3 
2 
2 
4 
2 
4 
1 
1 
- 
- 
No. 1 
2 
5. I. 10 
0. I. 10 
— 
9. I. 16 
- 
- 
2 
3 
3 
2 
6 
3 
2 
6 
4 
2 
5 
5 
8 
1 
3 
7 
- 
No. 1 
3 
9. I. 10 
9. I. 10 
— died 12. i. 16 
- 
o 
2 
5 
6 
3 
5 
5 
5 
7 
4 
1 
4 
3 
6 
1 
4 
7 
5 
No. 2 
4 
13. I. 10 
13. I. 16 
— 
10. I. 16 
- 
- 
3 
2 
3 
3 
4 
2 
3 
4 
5 
2 
3 
8 
7 
4 
- 
1 
6 I 
No. 2 
5 
10. I. 16 
16. I. 10 
— died 17. i. 10 
_ 
_ 
3 
1 
5 
2 
5 
2 
5 
2 
_ 
_ 
_ 
_ 
_ 
_ 
_ 
- 
No. 3 
(i 
27. I. 10 
27. I. 10 
— 
31. I. 10 
- 
- 
2 
3 
3 
5 
7 
5 
4 
0 
7 
4 
4 
6 
3 
6 
- 
1 
No. 3 
7 
31. I. 10 
31. I. 10 
— 
5. II. 10 
- 
3 
3 
4 
4 
5 
6 
3 
5 
5 
8 
3 
- 
2 
4 
8 
8 
7 
_ . 
No. 3 
8 
5. II. 10 
5. II. 10 
— 
8. II. 10 
_ 
3 
4 
5 
4 
0 
4 
2 
9 
4 
8 
5 
4 
7 
7 
8 
7 
7 
_ . 
No. 3 
9 
8. II. 10 
8. II. 1(5 
— died 9. ii. 10 
- 
1 
0 
4 
2 
7 
2 
6 
5 
4 
4 
4 
5 
6 
4 
3 
4 
5 
1 
No. 4 
10 
8. II. 10 
10. II. 10 
— 
11. II. 10 
- 
- 
3 
3 
3 
4 
4 
4 
4 
4 
7 
2 
4 
5 
4 
3 
5 
3 
5 ■ 
No. 4 
11 
11. II. 10 
11. II. 10 
— 
12. II. 16 
- 
4 
4 
5 
5 
4 
8 
7 
6 
3 
6 
3 
5 
5 
4 
5 
7 
2 
4 ; 
No. 4 
12 
12. II. 16 
( 12. II. 16 
\15. II. 16 
— 
13. II. 16 1 
16. II. 16/ 
- 
- 
1 
1 
2 
3 
4 
4 
2 
4 
5 
3 
4 
3 
No. 4 
13 
13.11 10 
14. II. 10 
— 
15. II. 16 
- 
- 
3 
3 
2 
5 
4 
(i 
1 
3 
4 
4 
5 
5 
_ 
4 
2 
6 
3 
No. 4 
14 
10. II. 10 
10. II. 16 
— 
18. II. 16 
- 
- 
3 
3 
2 
5 
4 
4 
5 
3 
3 
0 
7 
3 
4 
6 
6 
2 
_ J" 
No. 4 
15 
10. II. 10 
18. II. 10 
— 
19. II. 16 
- 
3 
3 
7 
1 
3 
0 
3 
7 
3 
5 
1 
7 
4 
5 
3 
_ 
5 
3 
No. 4 
10 
19. II. 10 
f 19. II. 16 
\25. II. 16 
20. II. 10 
21. II. 16 j 
20. II. 16 j 
No. 4 
17 
19. II. 10 
21. II. 16 
— 
23. II. 10 
- 
- 
- 
2 
3 
4 
4 
4 
- 
5 
3 
0 
5 
3 
2 
7 
1 
6 
5 
No. 4 
23. II. Hi 
23. II. 16 
'— 
25. II. 10 
- 
- 
5 
1 
5 
4 
4 
2 
2 
2 
0 
(5 
5 
6 
5 
7 
3 
2 ; 
No. 4 
19 
20. II. 10 
20. II. 10 
— 
1. III. 10 
- 
2 
4 
4 
- 
1 
- 
- 
— 
— 
_ 
— 
— 
_ 
_ 
_ 
No. 4 
20 
1. III. 10 
1. III. 10 
— 
(). III. 10 
- 
1 
3 
3 
3 
3 
2 
0 
5 
2 
3 
No. 4 
7 
__ 
6. III. 16 
7. III. 10 
8. III. 16 
No. 4 
9 
— 
8. III. 16 
9. III. 16 
No. 4 
10 
9. III. l(i 
— died 10. III. 10 
t 
Note. The figures in heavy type indicate that these eggs were kept in separate 
i 
i I 
