SIB JOHN LUBBOCK ON ANTS, BEES, AND WASPS. 289 



Oba. 



1 . Queen went under the porcelain. 8 pupse were taken under yellow, 2 under poi'celain. 



2. „ „ „ 2 , ,.8 



3. ,, „ „ 8 „ „ 2 



4. „ ,, yellow glass. 5 „ ,, 5 ,, 



5. „ „ porcelain. 3 ,, „ 8 „ 



6. „ ., yellow glass. 8 „ ,, 3 „ 



7. ,, „ porcelain. 6 ,, „ 5 „ 



8. .. .. „ „ „ 7 

 9- „ .. „ „ „ 10 



10. „ ,, yellow glass. 9 „ ,, 1 „ 



11. „ „ porcelain. 8 „ ,,2 „ 



12. „ ,, „ 3 „ „ 7 



13. „ „ yellowglass. 10 „ „ „ 



14. „ „ porcelain. ,, „ 10 „ 



15. „ „ yellowglass. 10 ,, „ - „ 



16. „ „ „ 7 „ „ 3 



17. „ „ „ 10 „ „ 



18. „ ,, porcelain. 1 „ ,,9 „ 



19. „ „ „ „ „ 10 



98 92 



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

 pins, the bases of wliicli 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, walked backwards and forwards without 

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



I then allowed some ants {Lasius 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 were 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 aluiost pure red, the strontium and barium give 

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

 the ants. 



