HOT AT I N; ]>I 





Kj( used to this arrangement I waited till one was on 

 the disk (Fig. 25) and then gently drew it to the other 

 side of *, as shown in Fig. 26. In this case, however, 

 the ant did not turn round, but went on to <jr, when she 

 seemed a good deal surprised at finding where she was. 

 In continuation of the preceding experiments I 

 constructed a circular table 18 inches in diameter. 

 It consisted, as shown in Figs. 27 and 28, of three 

 concentric pieces a central F o, an intermediate 

 D E, H I, and an outer piece R c, K L, each of these 



Kisr. 27. 



three pieces being capable of separate rotation. This 

 arrangement was kindly devised for me by Mr. Francis 

 (ialton. 



I then connected the table with a nest of Lasius 

 niger by a paper bridge A, and also made a paper path 

 the table, as shown in Fig. 28, divided into five 

 pieces corresponding to the divisions of the table. 

 This I did because I found that the ants wandered less 

 if they were provided with a paper road than if they 

 walked actually on the wood itself. I then placed a 

 (nip containing larva? on the table at B, and put an ant >n 



