SENSES OF INSECTS. 259 
But though some of these arguments appear weighty, 
there are others, I think, that will more than counterba- 
lance them, making it probable that the seat of this sense 
is in the head, either in its ordinary station at the extre- 
mity of what I call the nose^ between it and the upper-lip, 
or under those parts. That the nose corresponds with 
the so-named part in Mammalia^ both from its situation 
and often from its form, must be evident to every one 
who looks at an insect a ; and when we further consider 
the connexion that obtains between the senses of smell and 
taste, how necessary it is that the seat of the one should 
be near that of the other, and that it really is so in all 
animals in which we certainly know its organ b ; we shall 
feel convinced that the argument from analogy is wholly 
in favour of the nose, and may thence consider it as pro- 
bable that the sense in question does reside there. Leh- 
niann seems to be of opinion, because an insect is usually 
smaller than what it feeds upon, that it makes no differ- 
ence whether it smells with its head or with its tail : but 
one would think that ajlging insect would be more rea- 
dily directed to its object by smelling with the anterior 
part of the body than with the posterior; and that a, feed- 
ing one would also find it more convenient in selecting its 
food. As to the argument, — that smell must be the neces- 
saty concomitant of the respiratory openings, and that 
there can be no smell where the air is not inspired, — 
this seems asserting more than our knowledge of these 
animals will warrant : for the organs of the other senses, 
though the senses themselves seem analogous, are so 
different in their structure, and often in the mode in 
Vol. HI. p. 475-. " A'. But. d'llisi. Nat. xxiii; 210 
s 2 
