Giannasi et al. (2001) raised insularis and septentrionalis to species level.

[4][5] Malhotra & Thorpe (2004) transferred this species (and a number of others) to the genus Cryptelytrops.

[8] Head scalation consists of 10–11(12) upper labials, the first partially or completely fused to the nasal.

Head scales small, subequal, feebly imbricate, smooth or weakly keeled.

[8] Found in Nepal, northeastern India (Assam, Himachal Pradesh and Jharkhand), Bangladesh, Myanmar, Thailand, Cambodia, Laos, Vietnam, southern China (Fujian, Hainan, Guangxi, Guangdong), Hong Kong, Macau, Indonesia (Sumatra, Java, Lombok, Sumbawa, Komodo, Flores, Sumba, Roti, Kisar, Wetar).