No. 539] THE BEHAVIOR OF 



677 



odors which it diffused could no longer act as allure- 

 ments. When placed in position among the cotton limbs 

 the box and glass were almost completely concealed by 

 drawing in and fastening around it a number of the sur- 

 rounding leaves. This box enclosed the blossom at (a). 



At (b) control. A natural blossom pinned in position. 

 The blossom at (a) received only two inspections, both 

 by small, unidentified bees. The blossom at (b) received 

 only five inspections, three being by Melissodes and two 

 by honey bees. There were no entrances at (b). 



Experiment No. 32. — August 9. Observations con- 

 tinued for one half hour, from 10 to 10:30 a.m. This 

 experiment was identical with the preceding, except a 

 third artificial blossom was added. 



(a) Same blossom enclosed in the glass case as used at 

 (a) in Experiment 31. 



(b) The same control blossom pinned in position. 



(c) An artificial paper blossom of crepe paper simu- 

 lating a cotton blossom in color. 



The blossom at (a) received one inspection by a Melis- 

 sodes which hovered in front of the glass a few seconds 

 only. 



{b) Received eight inspections, which include two 

 entrances by honey bees. The six inspections were 

 entirely by Melissodes. Three bees inspected the arti- 

 ficial paper blossoms at (c), including one each by a 

 Melissodes, an unidentified bee, and a honey bee, which 

 paused for a few seconds over the blossom but did not 

 enter. During the last few days bee visitors have been 

 rather too infrequent for satisfactory work, probably in 

 part owing to the partly cloudy forenoons. 



Experiment No. 33. — August 11. Observations con- 

 tinued for about one half hour, from 9 :00 to 9 :30 a.m. 

 Three blossoms are arranged in a row. 



At (a) three petals were placed in position on a leaf 

 which was spread out flat and held between two thin clean 

 5X7 glass plates bound firmly together. This was placed 

 in position among the branches of a plant and was nearly 

 concealed by overlapping around it a number of cotton 



