NO. 14 SENSE ORGANS ON MOUTH-PARTS OF BEE — McINDOO 9 



poured into each of five feeders, and the same amount containing three 

 drops of whiskey was likewise poured into each of five other feeders. 

 The odor of whiskey from the latter food was not pronounced to 

 the writer, but the taste of whiskey was quite pronounced. When 

 these foods were introduced into the cases the bees ate one as freely 

 as the other. Five minutes after feeding them the first count was 

 taken and thereafter every five minutes. Since it takes bees confined 

 in these cases only 10 to 15 minutes to fill their honey stomachs with 

 liquid foods, only two counts were taken. As an average for the 100 

 bees for two counts, 30 per cent were seen eating pure honey and 22 

 per cent eating honey containing whiskey, making 52 per cent eating 

 at any one count. 



A mixture of 25 cubic centimeters of honey and two drops of car- 

 bolic acid was divided into five equal parts, each part being fed to 20 

 fresh bees in the usual manner. For the first 15 minutes after intro- 

 ducing the food, the bees avoided it, but later a few ate it to a lim- 

 ited degree. As an average for the 100 bees for five counts, 3 per 

 cent were seen eating it at any one count. Nine days later this honey 

 did not emit such a strong carbolic-acid odor. It was again fed to 

 bees. Only two counts were taken. As an average for the 100 bees, 

 27.5 per cent were seen eating at any one count. 



The preceding was repeated by feeding honey containing oil of 

 peppermint (described on p. 4) to fresh bees. As long as the mix- 

 ture emitted a strong odor of peppermint the bees avoided it, but 

 nine days after preparing the mixture the bees ate it rather freely. 

 As an average for the 100 bees, 27.5 per cent were seen eating it at any 

 one count. 



Twenty-five cubic centimeters of honey were mixed with two drops 

 of each of the following: formic acid, sulphuric acid, xylol, formal- 

 dehyde, kerosene, and lime-sulphur. The bees usually avoided these 

 mixtures, but occasionally one or two offered to eat a little of the 

 food. The first count was recorded 30 minutes after introducing the 

 food and thereafter every hour. As an average for the 100 bees in 

 each set of experiments for five counts, the following numbers repre- 

 sent the bees seen eating at any one count : Formic acid — -7.4 per cent, 

 sulphuric acid — 4.2 per cent, xylol — 5.2 per cent, formaldehyde — 

 3.2 per cent, kerosene — 1.6 per cent, and lime-sulphur— 1.2 per cent. 



The following is a tabulated summary of the preceding results 

 obtained by feeding bees foods containing repellents. The figures 



