THE BRAIN. 
69 
two tubercles which end the peduncle, the inner one 
is directed towards the corresponding tubercle of the 
other pedunculated body, approaching very near to it 
without, however, quite touching. Its object appears 
to be to bring the two halves of the brain into relation 
with each other. The other, directed to the front, and 
only covered with the double trachean membrane, 
ends in a granulous surface, and nearly comes in con- 
tact with that part of the cranium situated between 
the antennae and the ocelli. 
It is on this part of the head, Dujardin says, that 
ants tap each other with their antennae when they 
wish to communicate with one another. 
From the brain proceed laterally the masses wTich 
expand to the compound eyes. The antennae are 
provided with nerves, each of w^hich Dujardin found 
to proceed from a special wxll-defined lobe, and three 
short and stout stalks on the upper part are connected 
with the ocelli. The nerves are placed over the internal 
discs of the pedunculated bodies, with wiiich they are 
in communication. The centre one is formed of tw^o 
separate stalks starting from the lobes on either side, 
which unite in a common centre, forming the simple 
eye. 
Such, then, says Dujardin, are the parts of the brain 
wiiich appear to be specially related to the faculty of 
intelligence. They are more or less covered with the 
pulpy mass, and it is only of this latter that consists 
the brain of insects wiiose faculties are only instinctive. 
He further says the more intelligence predominates 
over instinct the greater becomes the bulk of these 
