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The Japanese Fourlined or Red Eyed Rat Snake is one of the most frequently imported Japanese snakes. Even though here we are dealing with a true Rat Snake, in appearance it is much more reminiscent of a terrestrial Coluber species. On the many Japanese islands E. quadrivirgata has evolved numerous colour variations. The two best known of these are the normally coloured variety and the melanistic variety which has also been designated as Elaphe quadrivirgata f. atra (Jan, 1867).
This site has information on the following genera of Ratsnakes ... Spilotes, Spalerosophis, Ptyas, Zamenis, Elaphe, Rhinechis, Senticolis, Pseudelaphe, Pantherophis, Bogertophis, Orthriophis, Gonyosoma, Oreocryptophis, Oocatochus, Euprepiophis, Coelognathus, Archelaphe