Again, I'm not experienced enough to give you a definite answer, but since no one else is chiming in....
My GUESS is female. There aren't noticeable bulges under the tail, the coloring is fairly mellow, and the head is smaller and not strongly triangular in shape. Again, this is a guess, so take it for what it's worth.
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Torey
Eugene, Oregon, USA
1.1 Saharan Uros (Joe and Arthur)
3.0 Mali Uros (Spike, Turtle, and Tank)
1.1 Ornate Uros (Scuttlebutt and Shazzbot)
1.1 Collared Lizard (Ripcord and Rorschach)
2.0 Green Anoles (Bowser and Sprocket)
1.1 Chubby Housecats (Roscolux and Jenny)