LETTER XLII. 
INTERNAL ANATOMY AND PHYSIOLOGY 
OF INSECTS, CONTINUED. 
REPRODUCTION. 
THE reproductive organs of insects in their general de- 
nominations and functions correspond with those of the 
higher classes of animals; but as to number, proportions, 
and other particular details of their structure, they differ 
from them very considerably. I shall not now, however, 
enter at large upon this subject, but confine inyself prin- 
cipally to the consideration of those organs in the female 
which are appropriated to the formation, fecundation, 
‘maturation, exclusion and deposition of their eggs, and 
other circumstances relating to that subject. The or- 
gans connected with this function are the Sperm-reservoir ; 
the Oviduct; the Ovaries; and the Ovipositor. 
I. The Sperm-reservoir (Spermatheca) is an organ con- 
necting the vagina with the oviduct, which, according to 
Herold, receives the male sperm as into a reservoir’, and 
fecundates the eggs.in their transit through that passage. 
This vessel, which consists of a double tunic, in the cab- 
bage-butterfly terminates the vagina, and is connected 
4 Herold Schmetterl. tab, expl. vii. 
