A. Bacot 
245 
TABLE IX. 
Hatching of eggs of Pediculu's humanus when kept at a constant temperature. 
The eggs laid by 10 pairs of newly-matured lice were taken from the boxes in which they were laid 
(on cloth) each day and kept as separate batches in a humid atmosphere at 30° C. 
M q ® 4) .q 
efl O 2 •** fc. 
.s 
o gxs a 
« c a - p -2 
■S'-s g-o- -5 
C S ^ “ S 5 00 
A 85-0.5 ^ I? 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
30 
Record of hatching 
Number of days reckoning fr 
date of laying 
oin the 
9 10 
11 12 
29 — - 
60 — - 
68 — - 
71 — - 
84 — - 
120 — - 
61 — - 
71 — - 
62 — - 
60 — - 
42 — - 
115 —. - 
64 — - 
57 — - 
62 — - 
57 — - 
No record 
50 ■— - 
48 — - 
43 — - 
43 — - 
40 — - 
56 — - 
35 — - 
C -y ^ 
- 
as 
^ O — 
6<r5 
CiJ eft 
fc- ei+S 
V S<is 
41 .P 
4 
3 
2 
12 
5 
— 
— 
— 
21 
79 o 
• ^ /o 
38 
6 
— 
— 
— 
47 
00 
48 
15 
1 
— 
— 
66 
94% 
24 
18 
16 
— 
— 
58 
82 % 
56 
13 
9 
— 
— 
78 
93% 
52 
45 
13 
— 
— 
114 
95 9.,, 
26 
26 
— 
— 
— 
52 
85% 
21 
40 
5 
— 
— 
66 
93 % 
24 
24 
12 
— 
— 
60 
97 % 
34 
18 
6 
— 
— 
58 
97% 
29 
8 
1 
— 
— 
40 
95% 
68 
29 
5 
— 
— 
111 
97% 
15 
36 
10 
— 
— 
61 
95% 
14 
32 
4 
1 
— 
51 
89 % 
20 
32 
2 
1 
— 
55 
89 o/i, 
13 
16 
22 
1 
52 
61 % 
40 
7 
48 
96 % 
30 
16 
1 
— 
— 
47 
98% 
24 
13 
— 
— 
— 
37 
86 % 
25 
13 
— 
— 
— 
39 
91% 
27 
7 
— 
— 
— 
34 
85% 
45 
4 
— 
— 
— 
55 
98 % 
29 
— 
— 
— 
— 
33 
94 9o . 
— — 4 29 — — — — 
3% 
56% 
33% 
8 % 
0 - 2 % 
Summary 
hatched on the 7th day 
,, ,, 8th 
9th 
10th 
11th 
1398 
36 714 423 107 
1283 92 
