 The scalation includes 21 (23) rows of dorsal scales at midbody, 170-172/173-178 (or 169-172/168-178) ventral scales in males/females, 62-66/58-60 (or 63-69/56-62) subcaudal scales in males/females, and 10-11 supralabial scales.Found in the Philippines on the Batanes Islands.The type locality given is "Batan Island, Batanes Group, (lying between Luzon and Formosa)" (Philippine Islands).