SENSES OF BEES. 
practice of striking a sonorous body 
at the moment of departure, in order 
to restrain a swarm from flying away. 
Frequently, we hear an abrupt, a- 
gitated sound among those watching 
the entrance of a hive during the night ; 
but if a stranger insect or any ene¬ 
my happens to touch their antennsg, 
the guard is roused, the sound assumes 
a different character from that pro¬ 
duced bv the bees while buzzing or 
in flight, and the enemy is assailed 
by several workers from the interior. 
Should we strike the board of a 
hive, the workers soon put their wings 
in motxonj but on breathing through a 
