114 Bulletin de la Société Royale Eniomologique d'Egypte 
It will be seen that four fertilized females died 
before the beginning of December, and the fifth 
which escaped on 23.9.16 after making 16 egg-cases 
is not likely to have lived longer. We may, therefore, 
conclude that virginity in this species prolongs life, 
but only to a small extent, remembering how slow r 
the life is during the winter months. 
This prolongation, however, is not of much be¬ 
nefit to the individual as we have several records of 
the female coming to a painful end by bursting, at the 
same time scattering unfertilized eggs from her ova¬ 
ries. 
2. The Number of Egg-cases laid. 
From Table II , we see that the fertilized females, 
Nos 16, 17, 26, 88 and 120 made 16, 22, i 5 , 17 and 
17 egg-cases respectively. No. 33 which copulated 
just before making its 9th egg-case, on 23.9.16, died 
ii days later, 5 days after making its 10th egg-case 
No. 119 copulated for the first time on 18.10.16 after 
having madte 8 egg-cases, continued to live for more 
than three months and made 9 more egg-cases. 
Of the unfertilized females, 6 made no egg-cases 
at all, Nos i 5 , 87, 38 , 3 9, 91, g 3 , 116, 124, 128 and 
i 32 made i 3 , 8, 4 , 4 , 1, 2, i 3 , 11,7 and 1 respectively. 
It is therefore clear that there is in general a 
distinct reduction in the number of egg-cases laid, 
though we see from Table I, Nos 64 , 65 and 68 that 
in exceptional cases an unfertilized female may lay as 
many egg-cases as a normally fertilized one, these 
three having made 21, i 5 and i 5 respectively, 
