288 SENSE OF SMELL. 



hive , but if one is placed on the alighting-stage, the 

 others seem to take no notice of it, though it is in 

 general soon pushed ofif accidentally by their move- 

 ments. I have even seen the bees sucking the juices 

 of a dead pupa. 



As regards the senses of bees, it seems clear that 

 they possess a keen power of smell. 



On October 5 I put a few drops of eau de Cologne 

 in the entrance of one of my hives, and immediately 

 a number of bees (about fifteen) came out to see what 

 was the matter. Rose-water also had the same effect ; 

 and, as will be mentioned presently, in this manner 

 I culled the bees out several times ; but after a few 

 days they took hardly any notice of the scent. 



These observations were made partly with the view 

 of ascertaining whether the same bees act as sentinels. 

 With this object, on October 5 I called out the bees by 

 placing some eau de Cologne in the entrance, and 

 marked the first three bees that came out. At 5 p.m. 

 I called them out again ; about twenty came, including 

 the three marked ones. I marked three more. 



October 6.— Called them out again. Out of the first 

 twelve, five were marked ones. I marked three more. 



October 7. — Called them out at 7.30 a.m. as before. 

 Out of the first nine, seven were marked ones. 



At 5.30 P.M. called them out again. Out of six, 

 five were marked ones. 



October 8. — Called them out at 7.15. Six came out, 

 all marked ones. 



