/ 2 L'trs and Wasps. 



had got well used to the green paper I moved it 

 1 8 inches off, putting some other honey on blue 

 paper where the green had previously been. She 

 returned to the blue. I then replaced the green 

 paper for an hour, during which she visited it 

 several times, after which I moved it 18 inches, as 

 before, and put brick -red paper in its place. She 

 returned to the brick-red paper. But although 

 this experiment indicates that this wasp was less 

 strongly affected by colours than the bees which I 

 had previously observed, still I satisfied myself that 

 she was not colour-blind. 



8. I moved the green paper slightly and put the 

 honey, which, as before, was on a slip of plain glass, 

 about 4 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. Then, while she was absent 

 at the nest, I moved both the honey and the paper 

 about a foot from their previous positions, and 

 placed them about a foot apart. She returned as 

 Ubual, hovered over the paper, lit on it, rose again, 

 flew about for a few seconds, lit again on the paper, 

 and again rose. After two minutes had elapsed I 

 slipped the paper under the honey, when she almost 

 immediately (within five seconds) lit on it. It 

 seems obvious, therefore, that she could see green. 



9. I then tried her with red. I placed the honey 

 on brick-red paper, and left her for an hour, from 



