The second bee. What is sought is arc length. The first and third intermediate arcs are equal in length. The second arc length is the largest.

If you want to count.

The length of the side where the first and third bees fly is:

4*4+2*3. 14*2=28.56

The length of the side that the second bee flies over is:

4*4+4*2*3. 14* 1=4 1. 12