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. 



