STB JOHN LUBBOCK ON ANTS, BEES, AND WASPS. 



2S3 



experiment ; and I arranged tliem so that the violet followed 

 the red. As far, therefore, as position was concerned, this gave 

 violet rather the best place. The glasses used were dark violet, 

 dark red, dark green, and yellow, the yellow being distinctly the 

 most transparent to our eyes. 



Experiment. 







Experiment. 







X. Pupce 



under yellow. 



17. Pupa) under yellow. 



9 



}) 



JJ 



18. 



j> 



J) 



Q 



5) 



JJ 



19. 



JJ 



red. 



4 



5) 



JJ 



20. 



JJ 



JJ 





)> 



JJ 



21. 



JJ 



yellow. 



6. 



JJ 



JJ 



22. 



JJ 



JJ 



7. 



J) 



green. 



23. 



JJ 



JJ 



8. 



JJ 



JJ 



24. 



.JJ 



red. 



9. 



JJ 



red. 



25. 



JJ 



yellow. 



10. 



JJ 



yellow. 



26. 



JJ 



red. 



11. 



JJ 



red. 



27. 



JJ 



JJ 



12. 



JJ 



yellow. 



28. 



JJ 



JJ 



13. 



JJ 



JJ 



29. 



JJ 



JJ 



14. 



JJ 



red. 



30. 



JJ 



yellow. 



15. 



JJ 



green. 



31. 



JJ 



red.' 



16. 



JJ 



JJ 



32. 



JJ 



green. 



put two extra thicknesses of glass over the red and 



I now 

 green. 



33. Pupa^ under red 



34. 



JJ 



yellow. 



38. 



JJ 



JJ 



35. 



JJ 



red. 



39. 



JJ 



yellow 



36. 



JJ 



yellow. 



40. 



JJ 



red. 



37. Pupae under red. 



The result is very striking, and in accordance with the observa- 

 tions on 'Formica fusca. In 40 experiments the pupse were carried 

 under the yellow 19 times, under the red 16 times, and under the 

 green 5 times only, while the violet was quite neglected. After the 

 first twenty observations, however, I removed it. 



I then tried a nest of Cremastog aster scutellaris with violet glass, 

 purple glass, and red, yellow, and green solutions, formed re- 

 spectively with fuchsine, bichromate of potash, and chloride of 

 copper. The purple looked almost black, the violet very dark ; the 

 red and green, on the contrary, very transparent, and the yellow 

 even more so. The yellow was not darker than a tincture of 

 saffron. The latter indeed, to my eye, scarcely seemed to ren- 

 der the insects under them at all less apparent ; while under 



LINN. JOUBN. — ZOOLOGY, VOL. XIV. 20 



