i8 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 65 



Pure cane-sugar candy and the mixture containing sodium car- 

 bonate were fed alone. As an average for the 100 bees for five 

 counts, 56.6 per cent were observed eating pure cane-sugar candy at 

 any one count, while none ate the mixture containing sodium car- 

 bonate. 



Pure cane-sugar candy and the mixture containing sodium sul- 

 phite were also fed alone. As an average for the ioo bees for five 

 counts, 52.2 per cent were seen eating pure cane-sugar candy and 

 3.2 per cent eating the mixture containing sodium sulphite, making a 

 total average of 55.4 per cent eating at any one count. An hour after 

 introducing the food, a few bees became sick. 



Pure cane-sugar candy and the mixture containing sodium nitrate 

 were likewise fed alone. As an average for the 100 bees for five 

 counts, 45.6 per cent were seen eating pure cane-sugar candy and 3.8 

 per cent eating the mixture containing sodium nitrate, making a total 

 average of 49.4 per cent eating at any one count. 



Pure cane-sugar candy and the mixture containing sodium fluoride 

 were fed last. As an average for the 100 bees for five counts, 32.2 

 per cent were observed eating pure cane-sugar candy and only 0.4 

 per cent eating the mixture containing sodium fluoride, making a total 

 average of 32.6 per cent eating at any one count. A half hour after 

 introducing the food, several bees became sick. 



The following is a tabulated summary of the preceding results 

 obtained by feeding bees foods containing sodium salts. The figures 

 in the third to eighth columns represent the average per cent or num- 

 ber of bees eating a particular food at any one count. 



TABLE VI 

 Experiments in Feeding Bees Foods Containing Sodium Salts 



