I think I found out by finding a diagram online of the male and female salamanders. I think the females have a more protruding cloaca, the male have a small one... try google images....
Here a Couple quick tips:
1) Always have a secure lid with no large holes in it for your tank.... they can escape!
2) Feed a diet of various insects like mealworms, waxworms, slugs...eww, crickets, etc... with vitamin powder if possible
3) Sallies like colder temps
4) Sallies need to have water to submerge themselves in
5) Keep the water clean
6) Nix the flourescent lights and use natural light
7) Sallies should be a little chubby, but not fat... feed every 2 to 3 days
8) Sallies also like to bury themselves in soil..
hmm... just google around and see the different info, I'm sure there are lots of different opinions on raising these cute little animals.