It looks like a female in that picture, but in the other two pictures of it in the gallery it looks like a male... Could you maybe take a picture showing the entire bottom of the abdomen (if that's possible)
The large leg plates spell female to me, its the best way to tell young I've found, males plates are much smaller than females and they don't go up and down with feeding like the abdomen can.
You can sex them by L2 if you look close enough. Females have a 'V' indent on the underside of the final segment. That is the surest method for sexing.