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ANIMAL INTELLIGENCE. 
each other two such mutilated bodies of the F. rufibarbis. They 
conversed with each other in the above-described way, and ap- 
peared each to beg for help. But when he put in some simi- 
larly mutilated ants of a hostile species, F sanguined , the 
picture was changed ; war broke out between these cripples 
just in the same way and with the same fury as between per- 
fect ants . 1 
The antennae appear to be the most important of the 
sense-organs, as their removal produces an extraordinary 
disturbance in the intelligence of the animal. An ant so 
mutilated can no longer find its way or recognise com- 
panions, and therefore is unable to distinguish between 
friends and foes. It is also unable to find food, ceases to 
engage in any labour, and loses all its regard for larvae, 
remaining permanently quiet and almost motionless. A 
somewhat similar disturbance, or rather destruction, of the 
mental faculties is observable as a result of the same 
mutilation in the case of bees . 2 
1 Ruchner, Geistesleben dev Tlnere , English translation, p. 49. 
2 While this work is passing through the press, an interesting 
Essay has been published by Mr. MacCook on the Honey-making Ant. 
I am not here able to refer to this Essay at greater length, but have 
done so in a review in Nature 'March 2, 1882.) — G. J. R. 
