



SIE JOHN LUBBOCK ON ANTS, BEES, 



AND WASPS. 



289 



01^8. 











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Queen went under the porcelain. 



8 pupaj were taken under yellow, 2 under porcelain. 



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I then put two ants on a paper bridge, the ends supported by- 

 pins, the bases of which were in water. The ants wandered back- 

 wards and forwards, endeavouring to escape. I then placed the 

 bridge in the dark and threw the spectrum on it, so that succes- 

 sively the red, yellow, green, blue, and violet fell on the bridge. 



The ants, however, w^alked backwards and forwards without 

 (perhaps from excitement) taking any notice of the colour. 



I then allowed some ants (Zasius niger) to find some larvae, to 

 which they obtained access over a narrow paper bridge. When they 

 had got used to it, I arranged so that it passed through a dark 

 box, and threw on it the principal colours of the spectrum, namely, 

 red, yellow, green, blue, and violet, as well as the ultra-red and 

 ultra-violet ; but the ants took no notice. 



At the suggestion of Prof. Stokes, I then tried the following 

 experiments. Mr. Spottiswoode not only most kindly placed the 

 rich resources of his laboratory at my disposal, but he and his 

 able assistant Mr. Ward w^ere good enough to arrange the ap- 

 paratus for me. 



We tried the ants with coloured lights in a Bunsen's burner, 

 using chloride of strontium and carbonate of lithia for red, chlo- 

 ride of barium for green, and chloride of sodium for yellow. The 

 lithium gives an almost pure red, the strontium and barium give 

 a little yellow, but so little that I do not think it would affect 

 the ants. 



