2/4 C. H. TURNER. 



and the hive, I arranged, on poles, about ten centimeters apart, three 

 red boxes containing honey, one empty red box and one empty green 

 box. The arrangement of the boxes in the group was altered once in 

 ten minutes. 



These boxes were under continuous observation for about an 

 hour. Immediately the bees began to visit the boxes that con- 

 tained honey in such large numbers that it was impossible to 

 count them. Occasionally a bee would enter the empty red box 

 and frequently the}' would hover in front of the entrance to its 

 tray. No bee entered the green box, although occasionally a 

 bee would alight on its top and pause long enough to clean 

 its legs on an edge of it, and frequently one would pause a 

 moment before some portion of the box. Whenever the honey 

 was exhausted from one of the trays, the number of visitors would 

 drop off. Seldom would a bee pass through the entrance; fre- 

 quently one w r ould hover momentarily before the door and then 

 pass on. As soon as I had replenished the honey, the bees would 

 begin to revisit it. 



EXPERIMENT 30. After the above experiment had been under 

 way for an hour, all of the boxes were removed from the field, except 

 the empty red and the empty green box of experiment 29. 



Immediately the bees began to enter the red box more frequently 

 than they had hitherto; as soon as one got well inside, it would 

 leave. After a lapse of a few minutes, the bees began to rush 

 for the entrance in such large numbers that those that had en- 

 tered and wanted to leave could not do so without a struggle. 

 As a result the tray and the portico were crowded with struggling 

 bees, and numerous others were hovering about the entrance, 

 seeking admittance. 



At first no bees entered the green box, although many circled 

 about it. After a lapse of ten minutes a few began to enter. 

 During the period of observation, ten were noticed to enter it 

 and leave immediately, and about twice that number were noticed 

 to alight in the portico. 



EXPERIMENT 31. Standing about three feet from the above boxes, 

 I held, in my hand, a red box containing honey. 



Immediately a few bees approached and entered the box. I 

 held the box in my hand for about five minutes. Throughout 



