46 Trans. Acad. Sci. of St. Louis. 



The insect after leaving the egg-case usually pays no 

 more attention to it. 



In order to ascertain the nature and condition of this 

 substance which goes into the egg-case while still in the 

 body of the female, a number of insects about to oviposit 

 were preserved in chloral hydrate and dissected — that 

 is, the chitin covering the entire abdomen was carefully 

 stripped off. The illustrations (PI. XIV, Figs. 1 and 2) 

 show the dorsal and ventral surface of the rows of whit- 

 ish ribbon, which are connected with the eggs that lie 

 just beneath; it is this ribbon-like material worked into 

 froth, that go into the construction of the egg-case. 



