SENSES OF INSECYS., 237 
this at the door, at first a few would answer him in a 
low note, and then the whole party would take up the 
tune and sing with all their might. He once shut up 
a male in his garden, and gave the female her liberty ; 
but as soon as she heard the male chirp, she flew to him 
immediately *. 
But although physiologists are for the most part agreed 
that insects have the ordinary five senses of vertebrate 
animals, yet a great variety of opinions has obtained as 
to their external organs; so that it has been matter of 
doubt, for instance, whether the antenne are for smell, 
touch, or hearing; and the palpz for smell, taste, or touch. 
Nor has the question, as it appears to me, been satisfac- 
torily decided: for though it is now the most general 
opinion that the primary use of antenne is to explore as 
tactors, yet by the most strenuous advocates of this opi- 
nion they are owned not to be universally so employed ; 
so that granting this to be one of their principal functions, 
yet it seems to follow that there may be another common 
to them all, which of course would be their przmary func- 
tion. We are warned, however, not to lay any stress 
upon the argument to be drawn from analogy; and told 
that we might as well dispute about the identity of the 
nose of a man, the proboscis of the elephant, the horn of 
the rhinoceros, the crest of the cock, or the beak of the 
toucan>. But this is merely casting dust in our eyes: for 
though three of these are nasal organs, bearing nostrils ; 
the two others have no relation to the question, the horn 
of the rhinoceros and the crest of the cock being merely 
appendages, and have no more analogy to the nose and 
2 Lehmann De Sens. Extern. Animal. Exsang. 22—. 
> Ibid. De Antenn. Insect. 1. 79. 
