Xo. o.'{S] 



THE BEHAVIOR OF BEES 



615 



A record of the kind of bees was not accurately kept, 

 but species of Melissodes were almost the only visitors. 

 The blossom at (b) was less visible than those at (a) 

 or (c), both of which were in plain view of each other. 

 The blossom at (b) was not visible cither from (a) or 

 (c), so that many bees which inspected (a) and (c) fre- 

 quently failed to perceive {b). 



Experiment No. 7. — July 27. Period of observations 

 one half hour from 11 :08 to 11 :38. Blossoms in the previ- 

 ous triangular arrangement changed as follows: 



(a) Normal blossom used in the preceding experiment 

 concealed by fastening the surrounding leaves in such 

 a manner that the blossom would be visible only by bees 

 passing directly over it. 



(b) Control. Normal blossom growing in situ. 



(c) Artificially constructed bud as used in latter half 

 of experiment 6. 



The inspections were as follows: 



(a) Received a single inspection from a bee flying 

 directly over. 



(b) Received 12 inspections, two of these being en- 

 trances. 



(c) Received 40 inspections, none being entrances. 



Experiment 7 differs from experiment 6 in no partic- 

 ular whatever except in the change which has rendered 

 the blossom at (a) invisible, except from a certain posi- 

 tion. The number of inspections at (b) and (c) re- 

 mained practically constant for each half-hour period. 

 It is interesting to note, however, that (a), receiving 48 

 inspections in experiment 6. received but a single inspec- 

 tion in experiment 7. A change in surroundings which 

 makes a blossom less visible to the visual sense of bee 

 visitors at once decreases the number of inspections. 



Experiment No. 8.— July 27. Time of observations 

 ten minutes from 11:38 to 11:48 a.m. Blossoms in the 

 triangular arrangement, with no change whatever from 

 the preceding experiment except in making the blossom 



