.PEKIMENTS ON COLOR-VISION OF THE HONEY BEE. 271 



that it \\a- impo ible for those that had reached the inner depths 

 to leave without a struggle; and, in less than tliirty minute-, 

 tin- cornucopia \\ a- packed almost full of strutting bees, and 

 numerou- others were hovering around the mouth. -ecking a 

 place to enter. 



Ivxi'i KIMI.NT 24. Ever since the beginning of this of ex- 



periments, the red cornucopias on the melilotus had been kept well 

 supplied :cith honey. At this time the w> >:>ained ei'J;t red 



-.nenpins and an equal number of empt . Into the 



upper pnrlmn tif this weed, I placed an empty red eornn> 



1'iiiii,^ i!ic five minutes that this cornucopia \\a- uatched, 

 t \\ el\ c I ees i -n tercel, one at a time, tarried a m< micnt ami i lu-n left . 



I \ri KIMI NT 25. In the open, three feet from //'; 



:n<t>pid of experiment 23, I placed, on a rod, a>: 

 i uniin npiii. In this place, earlier in the morning, there had 

 d cornucopia well supplied with honey. 



1 Miring the ten minutes that this cornucopia was ol)MT\r<l, 

 man\ I (- liovered around it ; one alighted on the front platform, 

 but MOIH- entered. 



All of the cornucopias were removed from . '</ except the 



empty red cornucopia of experiment 23 and : '>ty ^reen 



his experiment. This left only two corns in the field; 



red and one green, neither of which had ever contained honey. 



I hi i^reen cornucopia was watched continuous!) for tc-n min- 

 utt-. I'miiii; that time many bees ho\'ered around the green 

 conmcopi.i ; t \\ o aliijiied on the front platform, and one entered. 

 \i i lir close "t i In- icn minutes, I walked over to the empty red 

 cornucopia and ton ml it almost full of strui^liiiK bees, and ntinier- 

 ou- other I iee- \\en- ho\ering around the entrance seeking admit - 

 tai;. 



Series IV. (July 15, 3 P.M.) 



This >erie> < !" e\periinciil s was I'ontliu'ted with sj>ecial (.ud- 



boanllH.v h consisting of a rectangular outer case (8 > 5.2 



X 2.5 cm.) with a porch-like cxtcn-ioii in front and open end-, 

 into \\hich then' \\a- -ho\.il. from the rear, .1 canll'oanl t ra\- 



5-5 X v s X 2.4 cm. \< ir one side of the front end of this tray an 



i-iiirance \\ a- m.ule. In most cases this entrance was a reciaii-u- 

 lar optMiinu 2 X 1. 2 cm.; in a >pecial ca-e it wa> circular and 1.5 



