34 Trans. Acad. Sci. of St. Louis. 



(i) The number of dags spent in ovipositing and the num- 

 ber of eggs deposited each dag. 



Notes from observations on four fertilized females. 



In three out of four instances the eggs were deposited 

 in three days ; in the fourth instance oviposition consumed 

 four days, but on the fourth day only a very few eggs were 

 deposited. In three cases out of four we find the greatest 

 number of eggs deposited on the first day, in the fourth 

 case on the second day. In every instance the smallest 

 number were deposited on the last day. 



IV. The Relation of the Duration of Life, the Rela- 

 tion of the Time Spent in Copulo, and the Rela- 

 tion of the Ages of Paeents at the Time of 

 Copulation to the Number of Eggs 

 Retained at Death. 



(a) The relation of the duration of life of unfertilized 

 females to the number of eggs retained at death. 

 Notes derived from observations in four instances. 



The above figures apparently show that there is a rela- 

 tion between a long life and perfect oviposition, and a 

 short life and imperfect oviposition. "We shall see later, 



