POWERS OF COMMUNICATION, 165 



been informed by a of the existence of the larvEe, they 

 found their way to them by tracking a's footsteps. If the 

 former, they would in any case pass over the bridge k 

 by whichever strip of paper it was constituted. On 

 the other hand, if they found the larvae by tracking, 

 then as the piece of paper by which a passed was 

 transferred to L, it would mislead them and carry them 

 away from the larvse to i. In every case, then, I trans- 

 posed the two papers forming the little bridges as 

 soon as the ant a had crossed over K and L. 



I put her (November 7, 1875) to the larvae on f 

 at 6.15 A.M. After examining them carefullyj she re- 

 turned to the nest at 6.34. No other ants were out ; 

 but she at once reappeared with four friends and 

 reached the larvae at 6.38. None of her friends, how- 

 ever, crossed the bridge ; they went on to d, wandered 

 about, and returned home, a returned to the larvse at 

 6,47, this time with one friend, who also went on to D 

 and returned without finding the larvae. 



7. 0. Ant A to larvae. 



(went over 

 An ant at /.lO- 



i . 



L to I. 



7,17 „ with a friend, who at 7.21 



( with two friends, , 

 7.25 „ i . , ,'[■ 7.27 



one of whom at 

 7.32 „ the other at 7.35 



iwith a friend who'] 

 went on to D, and \ '''•41 

 then at ) 



