66 Bees and Wasps. 



the blue paper. After she had made three more 

 visits, always to the blue paper, I transposed them 

 again, and she again followed the colour, though 

 the honey was left in the same place. The follow- 

 ing day I was not able to watch her ; but on the 

 1 4th at 



7.29 A.M. she returned to the honey") . 



on the blue paper . . .j At 7.31 she left. 



7-34 741 ,. 



7-56 



I then again transposed the papers. At 8.5 she 

 returned to the old place, and was just going to 

 alight ; but observing the change of colours, without 

 a moment's hesitation darted off to the blue. No 

 one who saw her at that moment could have enter- 

 tained the slighest doubt that she perceived the 

 difference between the two colours. 



6. On October 2 I placed some honey on slips of 

 glass resting on black, white, yellow, orange, green, 

 blue, and red paper. A bee which was placed on 

 the orange returned twenty times to that slip of 

 glass, only once or twice visiting the others, though 

 I moved the position and also the honey. The next 

 morning again two or three bees paid twenty-one 

 visits to the orange and yellow, and only four to all 

 the other slips of glass. I then moved the glass, 

 after which, out of thirty-two visits, twenty-two 

 were to the orange and yellow. This was due, I 

 believe, to the bee having been placed on the 



