Adult true pyxies lose the yellow stripe. Juvenile true pyxies normally have two bright green or yellow stripes along with the one on the dorsal. Dwarf pyxies normally have lounger snouts, and they have a more beige stripe down the middle. Dwarf pyxies keep a small spot on the typanum (ear drum) as well as having a more blotched coloration. If you can email me a picture then I could tell you what species.
As for food, hissing cockroaches, nightcrawlers, and crickets make a great staple diet. Other invertebrates can be fed, but not as much as those three which are easily available, easy to keep, and pretty healthy if cared for properly.
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Andy Maddox
AIM: SurfAndSkimTx04
MSN: Poloboy32486@hotmail.com
Houston Herp Key
The Reptizone