It's Dr. Zira, from "Planet of the Apes." This was another experiment using the pencil "brush" in Photoshop.
For some reason this drawing is very popular on my Flickr page. As of this post, it's at #6. I guess people still like those damned dirty apes after all these years.
Drawn in Photoshop on the graphic tablet.
Here's the original sketch. Her hair's a bit different here-- I made it wider at the bottom in the final drawing to make her look more feminine (for an ape, anyway).
Her clothing changed a bit as well. That's because I did the sketch from memory and couldn't remember all the bits & pieces. I got out my 12" Dr. Zira action figure to look at for the final drawing. Yes, I have a 12" Dr. Zira action figure. And a Cornelius one too. Yes, I am a geek.