64 Bulletin Wisconsin Natural History Society. [Yol. 10, Nos. 1 & 2. 
ad. 9 
9 
9 
8 
5 
5 
Died in less than one day after 5th molt. 
ad. $ 
8 
8 
8 
4 
G0 
ad. 9 
9 
8 
9 
4 
| 
yg-- $ 
10 
9 
7 
4 
ad. $ 
10 
16 
2 
Died in process of third molt. 
yg- $ 
34 
2 
Died four hours after second molt. 
O) 
yg- $ 
22 
2 
Died one day after second molt. 
M 
ad. $ 
7 
8 
8 
4 
5 
Died six hours after fifth molt. 
0 
ad. 9 
12 
11 
3 
tUD 
c 
yg- 9 
8 
7 
9 
4 
ad. $ 
10 
6 
8 
4 
Oi 
in 
ad. $ 
10 
11 
10 
4 
ad. 9 
8 
9 
8 
4 
ad. 9 
I 
35 
0 
Lived thirty-five days without molting-. 
it was observed molting the next morning (October 2ist) and at 
9:55 A. M. the molt was completed. The molted skin was removed 
from the dish. The next day (October 22nd) at 8:00 A. M. the 
animal had completed another molt. It is difficult to conceive 
that the hypodermal cells could secrete a new cuticle in twenty- 
two hours, and in all probability the third cuticle was nearly com¬ 
plete, if not complete, before the first cuticle was shed. The 
molted skin was carefully examined, but appeared normal in every 
respect. Two days later the animal died. The time of the molt 
depends indirectly upon the activity of the hypodermal cells. 
Death occurs most frequently during the molting process when 
the molt is either premature or delayed. This being the case, is it 
not possible that death at the time of the molting is due to an 
unhealthy or a parasitized condition of the animal rather than to 
the actual effects of the molting? 
breeding. 
Hyalellce breed more or less during the entire year, but natur¬ 
ally their period of greatest reproduction is during the summer 
months. This can quite readily be ascertained by the number of 
males carrying females, and by the number of young present in 
their natural habitat. The male carries the female until she molts ; 
during the molting of the female the male releases her, but takes 
her again soon after the molt is completed. It is then that copula¬ 
tion takes place. The male may continue to carry the female for 
several hours, or even days ; or he may release her almost immedi¬ 
ately after copulation. The eggs are passed into the egg sac, as 
