Hi
The work by Faivovich et al is available online at the American Museum of Natural History site 
- very interesting stuff
As for Elaphe - well i actually thing that personally that its quite strange to group eg. Elaphe scalaris together with Elaphe situla and Elaphe guttata - none of them seem to have anything in common (other than being colubrids). I have keept all three species and find it very weird that anybody has even considered grouping these together (especially scalaris is VERY unlike any other Elaphe)
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Regards
Jan Grathwohl
