252 SENSES OF INSECTS. 
this description ; the /nternal consisting of a spiral elastic 
thread, and seeming not at all fitted to receive Impressions, 
but merely to convey the air’. That nerves penetrate 
to the bronchiz, does not necessarily imply that they are 
connected with the sense in question, since this may be 
to act upon the muscles which are every where distri- 
buted. 
I shall now state some facts that seem to prove that 
scents are received by some organ in the vicinity of the 
mouth, and probably connected with the nose. M. P. Hu- 
ber, desirous of ascertaining the seat of smell in dees, 
tried the following experiments with that view. These 
animals, of all ill scents, abominate most that of the oil 
of turpentine. He presented successively to all the 
points of a bee’s body, a hair-pencil saturated with it: but 
whether he presented it to the abdomen, the trunk, or 
the head, the animal equally disregarded it. Next, 
using a very fine hair-pencil, while the bee had extended 
its proboscis, he presented the pencil to it, to the eyes 
and antennee, without producing any effect; but when he 
pointed it near the cavity of the mouth, above the insertion 
of the proboscis, the creature started back in an instant, 
quitted its food, clapped its wings, and walked about in 
great agitation, and would have taken flight if the pencil 
had not been removed. On this, it began to eat again; 
but on the experiment being repeated, showed similar 
signs of discomposure: oil of marjoram produced the 
same effect, but more promptly and certainly. Bees not 
engaged in feeding appeared more sensible of the impres- 
sion of this odour, and at a greater distance ; but those 
a at 2 a) 
See above, p. 62. Sprengel Commentar. 14—. 
