LEPIDOPTEROUS INSECTS. 85 
furnishes some presumption that they do this, at 
least, in the case of the males ; else why do they 
exhibit that peculiar structure which distinguishes 
the real eyes?” * 
Huber’s experiments seem to go far to establish 
a different theory. He says, “ Let us now inquire 
into the state or organ of this sense, whose existence 
has been so well established. 
« Nostrils have not yet been recognised in insects ; 
nor do we know in what part of the body they, or 
any other organs corresponding to them, are placed. 
Probably odours reach the sensorium through the 
medium of a mechanism similar to our own,—that 
is, the air is introduced into some opening at the 
termination of the olfactory nerves ; and hence we 
should examine if the stigmatat do not perform this 
function, or whether the organ we are in quest of be 
not situated in the head, or in some other part of 
the body. With the view of elucidating the matter, 
we made the following experiments :— 
“1, A pencil dipped in oil of turpentine—one of 
the substances most disliked by insects—was pre- 
sented successively to all parts of the body of a bee, 
which did not appear in the least affected, whether 
* Insect Miscellany, p. 63. 
+ Certain apertures, generally called stigmata, appear on 
each side of the body of insects, which naturalists believe to 
be appropriated exclusively to respiration. 
