Séance du 16 Avril 1924 
141 
as well as in the adults. As all the females which were 
not killed at the time of the final moult lived well on 
into 1917, whether they became adult before or after 
the end of 1916, it is impossible to find any method 
of comparing the longevity of unfertilized females 
from fertilized egg-cases with that of unfertilized fe¬ 
males from unfertilized egg-cases or with that of fer¬ 
tilized females from either without having a very 
much larger amount of material than we were able 
to keep. The length of the post-embryonic stage must 
be taken into consideration as well as the actual length 
of the life of the adult. As this stage varies from 2 to 
8 months according to time of hatching and to other 
causes of less importance referred to in the previous 
section, it follows that only such females as hatched 
about the same date and took about the same time to 
reach maturity can be compared with one another. 
Onlv four of the fifteen adults bred from unfertilized 
I ) 
egg-cases were in 'sufficiently good condition to be 
worth keeping; like the others which we killed they 
were from early egg-cases and reached maturity before 
the end of the year. One died on the 6th of April, an¬ 
other on the 26th of May, the other two paired with 
males captured outside in May and June but made no 
egg-cases, one was eaten by ants on the 16th of June, 
three days after copulation and the last died on the 
10th of July, having lived 268 days in the adult stage, 
one year all but three days from the date of laying of 
the egg-case from which she emerged. There is reason 
to suppose that such females would have laid normal¬ 
ly if they had been able to pair at the right time, that 
is shortly after the last moult. 
