Circular markers plotted in SubplotHost do not appear in legend #81

import matplotlib.pyplot as plt

import mpl_toolkits.axes_grid.parasite_axes as mpltk

fig = plt.figure()
ax = fig.add_subplot(1,1,1)

ax.scatter([0.4],[0.5], marker='x', label='crosses')
ax.scatter([0.5],[0.5], marker='o', label='circles')
ax.scatter([0.6],[0.5], marker='^', label='arrows')

ax.set_xlim(0.,1.)
ax.set_ylim(0.,1.)

ax.legend()

fig.savefig('test_original.png')

fig = plt.figure()
ax = mpltk.SubplotHost(fig, 1, 1, 1)
fig.add_axes(ax)

ax.scatter([0.4],[0.5], marker='x', label='crosses')
ax.scatter([0.5],[0.5], marker='o', label='circles')
ax.scatter([0.6],[0.5], marker='^', label='arrows')

ax.set_xlim(0.,1.)
ax.set_ylim(0.,1.)

ax.legend()

fig.savefig('test_mpl_toolkit.png')