A medium to large, slender snake. Largest Egyptian specimen has a total length of 900 mm. Tail relatively short, tail / total length = 0.17-0.18; nostril large, round, in a divided nasal; 1 loreal, 8 supralabials, fourth enters the eye, 160-197 ventrals, 48-86 paired subcaudals, dorsals strongly keeled, 19 scale rows around mid-body, anal divided. Dorsum dark green-olive, with a pattern of regularly spaced black spots; a black chevron on the nape. Venter yellow, variably chequered with black squares, or is sometimes almost completely black.
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