284 



SIE JOHN lUBBOOK ON ANTS, BEES, AND WASPS. 



the violet and purple I could not trace them at all. I altered 

 the relative positions as before. The nest contained about 50 

 larvae and pupsB. 



Observation. 



1 Violet gl, 



3 Fuchsine. 



4 Green. 



5 Violet gl. 



6 Fuchsine. 



7 Violet gl. 



8 Purple gl. 



3 +J ■*-) 



Purple gl Bichr. pot. Fuchsine. 



Biohr. pot. FuchBine. Violet gl. Purple gl. 



Violet gl. Purple gl Bichr. pot. 



Bichr. pot. Violet gl. Purple gl. Fuchsine. 



Purpl. gl, Fuchsine Bichr. pot. 



Bichr. pot. Purple gl. Violet gl. 



Fuchsine Bichr. pot. Purple gl. 



Violet gl. Fuchsine Bichr. pot. 



9 Bichr. pot. Purple gl. Violet gl Bichr. pot. 



10 Fuchsine Bichr. pot. Purpl. gl. Violet gl. 



1 then poured out half the yellow and green solutions and fiUed 

 them up with water, making them even lighter in colour as before. 



fPupoi and 

 ObserTation. | larrse half 



12 Purple gl Violet gl, Fuchsine. Bichr. pot. J under the 



13 Biolir. pot, Purpl. gl Violet gl. Fuchsine. j veUow and 



I half under 

 ( the green. 



Thus in every case the larvte and pupae were brought under the 

 yellow or the green. 



Aug. 20. — Over a nest of Formica fusca containing about 20 

 pupae I placed violet glass, purple glass, a weak solution of fuch- 

 sine (carmine), the same of chloride of copper (green), and of bi- 

 chromate of potash (yellow, not darker than saffron). 



The pupa were placed under the yellow. 



green and j-ellow. 



yellow. 



green and yellow. 



yellow. 



Here, again, in every case the pupae were brought under the 

 yellow or the green. 



I then tried a nset of Lasius flavus with the purple glass, violet 

 glass, the very weak bichromate of potash, and chloride of copper 

 as before. 



