It is distinguished from other members of this genus by having mostly single subcaudal scales and a row of bold white spots where the dorsal and ventral scales meet.
22.
The scalation includes 17 rows of dorsal scales at midbody that are weakly keeled or smooth, 124-142 ventral scales, and 33-41 subcaudal scales.
23.
Scalation includes 6 supralabial scales, 19 rows of keeled dorsal scales at midbody, 140 ventral scales, a single anal scale, and 32 paired subcaudal scales.
24.
Males have 148-167 ventral scales and 58-64 subcaudals ( mostly undivided ), while females have 152-162 ventrals and 48-61 subcaudal scales.
25.
Scalation includes 21-23 rows of dorsal scales at midbody, 158-173 ventral scales, 41-56 subcaudal scales, and 10-13 supralabial scales.
26.
There are 152-167 / 159-177 ventral scales in males / females and 51-64 / 48-60 paired subcaudal scales in males / females.
27.
The scalation includes 17 rows of dorsal scales at midbody that usually lack keels, 7 supralabial scales, 120-126 ventral scales, and 28-33 subcaudal scales.
28.
The scalation includes 21-23 rows of dorsal scales at midbody, 176-188 ventral scales, 54-67 subcaudal scales, and 7-8 supralabial scales.
29.
Scalation includes 25 rows of dorsal scales at midbody, 201-212 ventral scales, 66-78 subcaudal scales, and 8 supralabial scales of which the third is the largest.
30.
Scalation includes : 23 or 21 rows of dorsal scales at midbody; 125 135 ventral scales; 36 55 paired subcaudal scales; and 8 ( sometimes 7 or 9 ) supralabial scales.
