392 'Journal of Couiparative Neurology and Psychology. 



TABLE IV. 



Prenolepis imparts Say. Series 4. 



* Over 100 pupae were used. Eight were carried down incline A, probably all by the same worker. 

 The remainder were carried down incline B. 



■f All were carried down incline B. 



t The pupae were all carried down incline A. 



° The workers were, at the beginning, much disturbed. The first three pupa were carried down 

 incline B. By that time a line of workers had begun to pass down inclined. After that occasionally 

 a pupa was carried down incline B. 



§ All of the pupa were carried down incline B. 



^ At first an occasional worker went down incline A, while a line of workers was passing down incline 

 B. Gradually the number going down incline A increased until there were lines of workers moving 

 down both inclines. 



** The majority of the workers began almost at once to store pupte in the dark chamber. One 

 worker soon found the way to the nest with a pupa, and after that made regular trips. It was not until 

 all of the pupae had been removed from the open and placed in the dark room that a line of workers 

 began to convey pupae to the nest. 



