Tail cylindrical, tapering, slightly swollen, covered with uniform, rather large smooth scales, which are imbricate beneath.

Tail cylindrical, tapering, above with uniform small smooth scales, beneath with a median series of transversely dilated plates.

Tail cylindrical, slightly depressed, tapering, covered above with minute scales and transverse series of large keeled tubercles, beneath with a series of large transversely dilated plates.

Tail cylindrical, tapering, covered with email smooth scales, in its basal half with a tew scattered larger tubercles; median series of subcaudals enlarged.

Tail cylindrical, tapering, covered with uniform smooth scales arranged in rings.

Tail cylindrical, tapering, covered with small imbricated smooth scales, larger below.

Tail cylindrical, tapering, covered above with small granular scales and rings of six or eight large conical tubercles, beneath with uniform small imbricated scales.

Tail cylindrical, tapering, covered above with small, irregular, imbricate smooth scales and scattered pointed tubercles forming four or six longitudinal series, beneath with a series of transversely dilated plates.

Tail cylindrical, tapering, above with small flat scales and annuli of feebly keeled tubercles, beneath with a series of large transverse plates.

Tail cylindrical, tapering, above with very small keeled scales and annuli of spine-like tubercles, beneath with larger scales, but no transversely dilated median plates.