Turner, Homing of Ants. 



395 



TABLE VII. 



Myrmica punctiventrh Rog. Series I. 



* One pupa was conveyed down incline B, all the others down incline A. One worker ascended 

 incline B to the stage and carried a pupa down incline A. 



+ One pupa was conveyed down incline B, the remainder down incline A. 



t All of the pupae were conveyed down incline B. 



° A very large majority of the pupae were carried down incline B to the nest. One pupa was carried 

 down incline A to the nest and several were carried down incline A and stored under the base of the 

 incline. 



§ Up to bedtime the pupae had not been carried to the nest. Thus the ants were lost for over I2 

 hours. 



=f=* In the course of half an hour all of the pupae had been stored in the dark chamber. There they 

 were left, while the workers, one by one, straggled back to the nest. After the lapse of 2i hours and 

 thirty minutes, the pupae were still in the dark chamber. I then removed the dark chamber and placed 

 workers from the nest on the stage. 



IV. IMPRESSIONS THAT INFLUENCE HOME-GOING ANTS. 



I have endeavored to show that ants find their w^ay home by 

 virtue of something vs^hich they acquire by experience and retain; 

 in other words, that they acquire from their environment impres- 

 sions which influence their home-going. I now propose to examine 

 the nature of these impressions. 



Most recent students of ants write as though these impressions 

 were composed solely of olfactory elements. One group of writers, 

 represented by Bethe, claims that the home-going of ants is the 

 result of olfactory reflexes; another, represented by Wasmann, 

 claims that olfactory percepts are important. 



Scattered through the literature are passages which indicate 

 that some authors are not fully satisfied with this view. Lubbock 



