Hatching linewidth?

Hi,

I am trying to create a hatched region, with a "diagonal lines" hatch pattern. When using the PS backend, the hatch lines come out very narrow. Is there a way to increase the thickness of the hatch lines? I am using mpl version 1.0.1.

I think this question has been asked before (e.g., in 2008), but I couldn't find an answer.

Thanks!
-Jeff