Need to use matplotlib scatter markers outside the chart, in labels for a bar graph

Using Latex is a rather easy solution. For example:

from matplotlib import rc
rc('text', usetex=True)
plt.xticks(ind+width/2., ("$\lozenge$", "$\square$", "$\plus$", "o", "$\bigtriangledown$") )

And if you need help figuring out the names for the symbols, this is a great little website that allows you to draw the symbol you want and it will output the LaTex names.