40 Trans. Acad. Sci. of St. Louis. 
cases none. The average number of eggs retained for the 
twelve females was 50 5/12. 
25. The greatest number of eggs remaining in the body 
of the unfertilized female after death was 201; the small- 
est number 0. The average number for the four females 
was 95 eggs. 
26. The average number of eggs retained by the un- 
fertilized female was greater than the average number 
retained by the fertilized female by 44 7/12. 
27. The greatest entire number of eggs carried at hatch- 
ing by any female was 362; the smallest number 187. The 
average for the fifteen females was 292 4/15. 
28. Three days were for the most part spent in ovipos- 
iting. In almost all cases the greatest number of eggs 
were deposited on the first day, and in all cases the least 
number were deposited on the last day. 
29. In the unfertilized female there is an apparent 
relation between perfect oviposition and a long dura- 
tion of life, and between imperfect oviposition and a short 
life. Notes were made only on four specimens, an in- 
sufficient number for any definite conclusions. 
30. In the fertilized females, where notes were made 
on seven individuals, we see no relation between a long 
life and perfect oviposition, and a short life and imper- 
fect oviposition. 
31. There is no relation between the length of time 
spent in copulo and perfect or imperfect oviposition. 
32. We find a relation between the difference in the 
ages of the parents at the time of copulation and perfect 
or imperfect oviposition. Where the males and females 
are of equal age or where the females are younger, there 
is perfect or almost perfect oviposition. In all cases where 
the females are older, death overtakes them while still 
possessing a large number of eggs. 
