Contia modesta.
3. Scales longitudinally grooved in the adult, in 17 or 19 rows; two loreals; canthus rostralis strongly marked; frontal very narrow, in contact with the preocular; ventrals 160-189; subcaudals 68-102
Cœlopeltis monspessulana.
B. Pupil vertical or vertically subelliptic (sometimes appearing round in Macroprotodon).
1. Scales smooth, mostly with single apical pits; upper surface of head with nine large shields.
Frontal 11⁄2 to 2 times as long as broad; loreal separated from the eye by the preocular; one upper labial usually in contact with the parietal; scales in 19 to 23 (rarely 25) rows; ventrals 153-192; anal divided; subcaudals 40-54
Macroprotodon cucullatus.
Frontal 11⁄4 to 11⁄2 times as long as broad, much shorter than the parietals; loreal entering the eye; scales oblique, in 19 or 21 rows; ventrals 186-222; anal divided; subcaudals 48-73
Tarbophis fallax.
Frontal 11⁄4 to 11⁄2 times as long as broad, nearly as long as the parietals; loreal entering the eye; scales oblique, in 19 or 21 rows; ventrals 203-235; anal entire; subcaudals 54-70