400 EXPERIMENTS ON POWEE OF COMMUNICATION. 



37 journeys and brought 9 friends. The ant with few 

 larvse made 18 journeys and brought no friend. This, 

 I think, is a very striking case. She was under observa- 

 tion 5^ hours ; and the scene of her labour was the 

 same throughout. The first 2 hours she had few larvae 

 and brought 4 friends ; then for 1^ she had many larvse 

 and brought 21 friends ; then again for 2 hours she 

 had few larvae and brought no friend. 



ExperiTiient 23. — Time, 1^ hour. The ant with 

 few larvae made 25 journeys and brought 3 friends. 

 The other made only 9 journeys, but brought 10 friends. 



Experiment 24. — I now transposed the glasses. 

 Time occupied, 2 hours. The ant which now had few 

 larvae made 14 journeys, but brought no friends. The 

 other made 37 journeys and brought 5 friends. 



Experiment 25. — Time 3 hours. I put an ant for an 

 hour to a full glass ; she made 10 journeys and brought 

 4 friends. I then left only two or three larvae : in the 

 second hour she made 7 journeys and brought no 

 friend. I then again filled the glass ; and during the 

 third hour she made 14 journeys and brought 3 

 friends. 



