Harold,
I think that the new book on reptiles of Pakistan by M. S. Khan (Krueger publishing, but rather expensive book!) should have the info. and photos that you're looking for to distinguish the differences between these two alledged sub-species. I do have photos of both, but not handy. I might be able to track down digital shots, but I fear that some of them are on slides. The form with the clearer cross-banding can tend to be a bit smaller, whereas the ones with a netting pattern can be larger. I have see a few exceptions though.
I really wish I was around in this hobby 10 or even 5 years ago. The species that I search for seem to have come in by the boatload, now half of them can't even be bought! It is unfortunate that many of that era failed to see the value (not monetary) in this genus.
As humans we all normally learn from our mistakes. In this hobby, not all of us do - as many people come and go and just do not understand the trends and history of this hobby. What you've stated should be a blueprint for us to gauge our decisions by and not "dump" species just because they appear to lose their value. The "fly in the ointment" is when you work your butt off to breed something that's not so easy to breed, like a Teratoscincus, and then an importer throws them up on Kingsnake for $18 each. As a breeder, we make weighted decisions based on our own list of criteria for continued keeping in our terrariums. When the system fails, we throw em out. I'm guilty, most who have been around for years are too. I've seen countless rarities come through this hobby - a few return, many do not. I see the same thing happening with Teratoscincus przewalskii right now in this hobby. How many people on this forum have actually bred this species? With a photo or something for proof? I've seen no more than 6 c.b. offspring offered from this species in 27 damned years.
We should learn from these mistakes and implement safeguards from further species "slipping through cracks in the floor". Guess that's why I keep about 250 species of geckos presently.....I do not want to see the crack close with so many interesting animals falling through. I've seen it happen, and I will continue doing everything I can to keep them around and bring more in - when possible. What if the ability to import/export in the US was closed tomorrow. What would happen to values then? I guarantee you that in 2-3 years time, Aussie geckos would be in the dollar dumpster and Teratoscincus (and other not so easy to breed species) would escalate in value. Even things like Tokays, flying geckos and other over-looked forms would bounce up rather quickly. Look at Rhaco. trachyrhynchus. What a bizarre market and misplaced value. I saw them last year for $10,000 each?????? They're not very attractive at all when compared to other Rhacodactylus, they're definitely NOT handleable - they're crash test dummies that richochet off everything in their terrariums when startled, and in general just look boring and dumb.
Jon