LETTER XL1I. 
INTERNAL ANATOMY AND PHYSIOLOGY 
OF INSECTS, CONTINUED. 
REPRODUCTION. 
1 HE 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 myself 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 organs 
connected with this function are the Sperm-reservoir ,- 
the Oviduct ; the Ovaries ,- and the Ovipositor. 
I. The Sperm-reservoir {Spcrmatheca) is an organ con- 
necting the vagina with the oviduct, which, according to 
Herold, receives the male sperm as into a reservoir a , 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 
with the oviduct by a lateral undulating tube : in shape 
it is a rather irregular oblong, and is surmounted by a 
71 Herold Schmetterl. tab. expl. vii. 
