I 
Séance du 16 Avril 1926 135 
as the facts I am about to discuss are concerned, they 
may be neglected. 
TABLE XI. 
Giving the Length in Days of the Incuibation Period. 
No. 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
3 
79 
58 
51 
46 
43 
41 
35 
31 
31 
29 
27 
26 
26 
22 
25 
16 
18 
19 
18 
16 
20 
21 
21 
22 
23 
24 
25 
29 
35 
38 
16 
17 
18 
19 
19 
19 
20 
20 
21 
21 
22 
23 
24 
25 
27 
31 
35 
125 
20 
23 
21 
21 
23 
20 
24 
24 
26 
29 
33 
33 
37 
36 
39 
49 
88 
18 
19 
19 
20 
20 
21 
21 
22 
23 
24 
25 
29 
32 
34 
36 
38 
38 
17 
17 
18 
18 
19 
19 
17 
19 
20 
13 
21 
22 
22 
23 
24 
26 
29 
32 
34 
35 
37 
36 
43 
65 
21 
21 
22 
22 
23 
24 
26 
30 
34 
38 
34 
42 
47 
15 
21 
21 
22 
23 
23 
23 
25 
27 
30 
34 
36 
41 
47 
68 
22 
25 
23 
24 
26 
27 
32 
36 
39 
40 
40 
40 
45 
52 
64 
21 
21 
22 
22 
23 
25 
24 
29 
33 
37 
37 
40 
38 
40 
44 
48 
124 
22 
25 
25 
26 
30 
36 
38 
41 
40 
41 
53 
U9 
22 
26 
129 
32 
37 
39 
41 
34 
41 
91 
The « — )) indicates that no young emerged. 
I have arranged this table in the same order as 
preceding tables to facilitate comparison. The fer¬ 
tilized females are in order according to the number 
of egg-cases laid and the unfertilized according to 
the number of young which hatched. 
The table as a whole shows very clearly the extent 
to which seasonal variation affects the embryonic 
development and indicates that — like the post- 
embryonic development — it is continuous, though 
much retarded by adverse conditions. There is no 
Pull. Soc. R. Entomologique 
IO 
