TO 00 OUT OF THKIft WAY. 



271 



pin* ; while in returning to the nest they persistently 

 came down the side of the pillar nearest to the nest, 

 though I repeatedly attempted to guide them the 

 other way. Even when placed on the paper bridge 

 between M and M', they were very dissatisfied. In 

 .act, it was obvious that they knew they were being 

 tient a long way round, and were attempting to make a 

 >h>rter cut. 



I then again placed the larvae on the column at 

 M, and when the ants were once more going to and 

 fro regularly along the paper path, I altered the 

 position of the column and larvae to M 7 , placing the 

 edge of the pillar, which the ants had been accustomed 

 to ascend, towards the paper bridge, connecting it with 



Fig. 30. 



the original bridge by a side- 

 bridge a, M being an inch from 

 the original bridge. Under 

 these circumstances three ants 

 ran on to M ; then two found 

 their way over the bridge a to 

 M . ()f the next ten ants, five 

 went to M and five over a to M'. 

 The next ten all went over the paper bridge a to M'. 



I then put the pillar and the larvae on the other side 

 of the original paper path at M", connected with th j 

 main path by a short bridge a', taking for a' a new 

 piece of paper, so that scent would be no guide. I left 

 the little bridge a in its place. The ants went aa 

 follows: 



