2 54 C. H. TURNER. 



each case the behavior was essentially the same. In its flight, 

 neither the orientation of its body nor the direction of its move- 

 ments bore any constant relation either to the direction of the 

 wind or to the rays of the sun. 



Experiment I. 



Whiie the bee %vas afield, zvith a stick of the same diameter as 

 the bnrrotv, I punched, in the ground in front of bricks W^ and 

 E^, holes which bore the same relation to each of those bricks that 

 the burrow opeinng did to brick zero. The inverted tin cap of a 

 coca-cola bottle zvas removed from its place beside the bnrrozv and 

 placed, in the same relative position, at the side of the hole zuhich I 

 had made in front of brick W^ 



The bee, on returning from the field, arrived at brick PFj,^. It 

 then turned around so as to face the northern surface of the 

 brick border. Then hovering at about an inch and a half above 

 the ground and at about the same distance from the border, it 

 sidled along. Most of the time it moved towards the east ; but, 

 occasionally, it retrograded westward, for a short distance, and 

 then resumed its eastward progress. On reaching brick W^, it 

 dropped, at once, into the hole which I had made. It emerged 

 at once and continued its eastward course until it reached its 

 burrow, which it entered. It tarried in the nest a few minutes, 

 then departed, without stopping to explore the surroundings, for 

 the pollen field. Evidently, a slight topographical change of 

 the neighborhood of the nest caused the bee to enter a false 

 burrow, which it discovered was not its own. 



Experiment II. 



While the bee zcas afield, I punched holes, similar to those de- 

 scribed above, before bricks W^, W^ W^, W^, and bricks E^, E^, 

 E^ — one hole before each brick. For descriptive purposes, I shall 

 call the holes before bricks W^, W^, W^, etc., respectively L^, L^, L^, 

 etc., and those in front of bricks E^, E^, E.^, etc., 7?,, R^, R^ etc. 



On returning from the field, the bee arrived at brick IV^^^. It 

 then turned about so as to face the northern surface of the border, 

 and, hovering and sidling, in the manner described in experiment 

 I., it moved eastward until it reached hole R^, into which it 



