EXPERIMENTS ON COLOR-VISION OF THE HONEY BEE. 265 



The bees that arrived at the weed in the vicinity <>t" the blue 

 disc dropped at once to the red disc, without even pausing before 



th<- MIII-. 



Exi'KKiMMNT 10. I placed three more rods in the midst of the 

 san: :'; on two of them I placed blue discs without honey, and 



on the othrr n>- ,i red disc with honey. 



At the end of fifteen minutes, all <>f tin- red di-r- were bring 

 vi-iied by numerous bees; none of the blur di-r- \\ere bi-ini; 

 visited. 



EXI-I KIMI \ i i i. Two rods were pla< ir each other that 



a spaec of >i<>t more than tu'O centimeters separated the discs, (hie 

 diM 7.(/v ri'd and the other blue. The red di>> ^upplied with 



honey, I In- him- was not. After they had been in one position for fifteen 

 -minutes, the red disc was placed where the blue had :nd the 



hi ite placed in //' - from which the red had been taken. 



I >urin;< ilit- tc\\ minutes that the-e di-r-. \\cn- under observa- 

 tion, 1 1 I.LIU bees \ i-ited the red di-r: >ne occasion, three 1 



\\ere i. lit. lining hne\ in.m it at the -.tine time. ( )nly one bee 

 \i-ilt I the blue, and, rvideniK, -he \\.i- not fura-in- |..r hoiie\ . 

 She -| ten i .it le.i-i ten minute- on the di-c and mo-t of that time 

 was spent in one place. A part of the time -lie \\a- rubbing her 

 . .iin-t the edge of the di-r, the remainder -he -eiiind to 

 be -impK re-ting. 



I \i-i KIMI.NI u. FiVi om a red disc contain; 



honey. I ; ntainin^ honey. 



I Hi rin- the ten minute- that the-e di- ( -, \\cre \\atched. nvd\ e 

 Visits were m.nK- to the red di-r and only one t.t the blue. < >n 

 three dillerriit occasions, tlu le \\eie three bee- on t hf rr< I di-r 

 at the -a me time. It \\a- at the close of the ten minutes that the 

 tii>t bee \ i-itcd the blue di-c. 



Just as soon as t'i:> d the honey and left the blue 



disc, the a replaced icith a blue disc that i.as nut supplied 



icith honey. 



\ Hiring the next ti\ \- minute-, ti\ e \i-it- \\ere made to the red 

 and none to the blue. < >ne bee hovered momen t ai il\ above the 

 blue and t hen \\ent to the red. 



K MM ixi\ii \ i i.v /;/ a different place from that ichere experiment 

 med, I arranged, close together on rods, one blue 



