38 Trans. Acad. Sci. of St. Louis. 
6 days and 16 hours. The average entire duration of life 
of fertilized females for the seven instances was 8 days 
4 hours and 28 4/7 minutes. 
9. The shortest lived male outlived the shortest lived 
female 1 day 22 hours and 40 minutes. The longest lived 
male outlived the longest lived female by 1 day and 10 
hours. The average duration of life of male was greater 
than the average duration of life of female by 1 day 20 
hours and 58 2/21 minutes. 
10. Regardless of age, we find in every case the male 
surviving its mate. 
11. The shortest duration of life of unfertilized female 
was 7 days and 30 minutes. The longest duration of such 
life was 9 days. The average duration was 8 days 71/2 
minutes. 
12. The longest lived fertilized female outlived the 
longest lived unfertilized female by 19 hours and 30 min- 
utes. The shortest lived unfertilized female outlived the 
shortest lived fertilized female by 8 hours and 30 minutes. 
The average duration of entire life of fertilized female 
was greater than the average duration of entire life of 
unfertilized female by 4 hours and 21 1/14 minutes. 
13. The greatest duration of life of female from copula- 
tion until death was 8 days and 30 minutes. The shortest 
was 4 days. The average duration of life of female from 
copulation until death was 5 days 23 hours and 25 5/6 
minutes. 
14. The number of days which elapsed in the life of the 
fertilized female from hatching to the time when the first 
eggs were deposited in the one observation was 3 days. 
15. The average length of time which elapsed in the 
life of the unfertilized female from hatching until 
the first eggs were deposited for the two cases observed 
was 3 days and 12 hours. 
