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



Mannose, which appears to be almost as sweet as saccharine, has a 

 disagreeable, bitter-sweet taste. Each one of these sugars has its own 

 faint, characteristic odor, but the predominating odor emitted from 

 the candy made of each is that of honey. To the writer the starch 

 candy gave off only one faint odor, that of honey. Dextrine is light 

 yellow and emits a stronger odor than does any one of the sugars. 



Twenty fresh bees were introduced into each of five cases. When 

 the preceding nine candies were put into the cases, the bees wandered 

 about considerably and ate a little of each candy, but ate the mannose 

 and levulose most greedily. A short time after eating the mannose, 

 many of the bees began to die. Thirty minutes after feeding the bees, 

 the first count was taken, and thereafter every half hour. The four 

 counts recorded showed that only one bee was seen eating mannose, 

 four eating levulose and none eating any of the other candies. This 

 small number is certainly due to most of the bees soon becoming sick 

 and some dying. 



The preceding experiments were repeated by feeding cane-sugar 

 (saccharose) , saccharine, mannose and levulose candies to fresh bees. 

 As usual the bees wandered about considerably and ate a little of each 

 candy except the saccharine. An hour later those that had eaten the 

 mannose became sick and ate no more that day, but the next morning 

 most of them had recovered and a few were seen eating a little. As 

 a total for the 100 bees for 17 counts, 10.7 per cent were seen eating 

 cane-sugar, 6 per cent eating levulose, 1 per cent eating saccharine 

 and none eating mannose candy. 



To ascertain if bees could be forced to eat saccharine, fresh bees 

 and a lump of the saccharine candy were put into each of the five cases. 

 The bees perched upon and ran over the candy as if it were a piece of 

 wood. It neither repelled nor attracted them, and during an entire 

 hour only five bees licked the candy for a few seconds. The starch 

 candy was next tried alone. During the first ten minutes several 

 bees ate it rather freely, but after that for an hour only occasionally 

 did a bee eat a little of it. 



Cane-sugar, dextrose, dextrine and raffinose candies were put into 

 each case, and fresh bees were employed as usual. As an average for 

 the 100 bees for five counts, 41.2 per cent were seen eating cane-sugar, 

 2.6 per cent eating dextrose, none eating dextrine and 0.2 per cent 

 eating raffinose candy, making a total average of 44 per cent eating 

 at any one count. 



Levulose, dextrose and raffinose candies were next used. As an 

 average for the 100 bees for five counts, 20 per cent were seen eating 



