EXPERIMENT- ON COLOR-VISION OF THE HoM V BEE. 267 



used in experiment fourteen, the rod was gently carried fifteen feet 

 nearer the hire and erected in a place that was free from tall weeds; 



: the grass had been cropped short by a horse that had been 



:/;/;' //; 



The bees, on leaving, hovered about tin- di-c a Ion- time, even 

 mining the cork to which the di-c \\a- piniu-d. 1 hen, alter 

 dea riliinu .1 -hallow spiral, they flew a\\a\ . In a -lion iinu- -i\ 

 h.id reiumed to this disc. On her return, each bee ile\\ to the 

 i <.:k tir-t and then to the top of the di-c. I was ii"\\ t'orcrd to 

 leave the experiment for half an hour. On my return, the di-c 

 \\.i- l.iiirc \i-iied liy numerous bees. 1 hiring the !i\e minntc- 

 th.tt I \\.itched it, twenty-six visits were made to it. There \\< n 

 .il\\a\ - from six to ten bees on the disc. 



I \ri KIM! vi 16. From the melilotus weed in which the first 

 r.v/ !s of this series were perform <:. I '..'.. ' a rod 



whii h . ! with a red disc upon ichich ten ' 



tim: en feet further away from the hire, in another patch 



>rer. 



The bees on leaving made a careful orienting Ili^ht. I left 

 the di^c for about twenty minutes. On m\ return. 1 found 

 seven bee- re-ting on the disc and imbibing hoi,. 



I \v\ -NIMKNT 17. At that end of the field most distant 



from the hire, and at about fifty yards from th< ^ in which the 



first experiments of this series were performed, there was a l<. 

 patch of the same plants, from the racemes of : numerous 



.'/<( //;;; honey. In the midst of these weeds, hut well exposed, 

 I placed a red .// poured some honey. 



I inn, lined b\ thi- i d for tuenty minutes, but no bee a|)- 

 pn. ached it. At intei\al> of ten minutes, I made six vi-it- to 

 thi> di-c. l-'.ach time I leinained h\'e minutes. At no time did 



1 III id an\ bee- \ i-itili^ the di-c. 



l ; ..\ri KIMI -NT 18. In a space / ! tall weeds, about thirty 



vtirds nearer the hire than the icccd in which the first experiments of 

 this scries were performed, I erected < my free foot rods and on 



its top placed a red disc well supplied with honey. 



At interxals of ten minute-, 1 made four vi-it- to thi- di-< 

 Tin- tn-t time 1 I'mmd one bee on thedi>c; the second lime, three; 

 the third time, t\\o, and the fourth, four. 



