Plotting complex numbers

Possible Duplicate:
Plotting an Argand Diagram

How do I plot complex numbers in Mathematica? The following is a part of my data, the eigen values of a 50 by 50 asymmetric matrix:

 2.183, 2.1726 + 0.081626 I, 2.1726 - 0.081626 I, 
 2.14149 + 0.161732 I, 2.14149 - 0.161732 I, 2.09002 + 0.238883 I, 
 2.09002 - 0.238883 I, 2.01881 + 0.311781 I, 2.01881 - 0.311781 I, 
 1.92881 + 0.379272 I, 1.92881 - 0.379272 I, 1.8213 + 0.440343 I, 
 1.8213 - 0.440343 I, 1.69787 + 0.494111 I, 1.69787 - 0.494111 I, 
 1.56041 + 0.539817 I, 1.56041 - 0.539817 I, 1.41104 + 0.57683 I, 
 1.41104 - 0.57683 I, 1.25211 + 0.60465 I, 1.25211 - 0.60465 I

I can extract the real and Imaginary parts using the commands with

Im[Eigenvalues[mtrx1]] 

and

Re[Eigenvalues[mtrx1]]

but then could not see how to pair up the real and imaginary parts in order to make a plot. Please help