EXPERIMENTS WITH COLOURED PAPERS. 317 
colours than the bees which I had previously observed, 
still I satisfied myself that she was not colowr-blind. 
I moved the green paper slightly and put the 
honey, which, as before, was on a slip of plain glass, 
about four feet off. She came back and lit on the green 
‘paper, but finding no honey, rose again, and hawked 
about in search of it. After 90 seconds I put the 
green paper under the honey, and in 15 seconds she 
found it. I then, while she was absent at the nest,’ 
moved both the honey and the paper about a foot from 
their previous positions, and placed them about a foot 
apart. She returned as usual, hovered over the paper, 
lit on it, rose again, flew about for a few seconds, lit 
again on the paper, and again rose. After 2 minutes 
had elapsed I slipped the paper under the honey, when 
she almost immediately (within 5 seconds) lit on it. 
It seems obvious, therefore, that she could see green. 
I then tried her with red. I placed the honey on 
brick-red paper, and left her for an hour, from 5 P.M. to 
6, to get accustomed to it. During this time she con- 
tinued her usual visits. I then put the honey and the 
coloured paper about a foot apart; she returned first 
to the paper and then to the honey. I then transposed 
the honey and the paper. This seemed to puzzle her. 
She returned to the paper, but did not settle. After 
she had hawked about for 100 seconds I put the honey 
on the red paper, when she settled on it at once. J 
then put the paper and the honey again 18 inches 
apart. As before, she returned first to the paper, hut 
