Trimeresurus albolabris
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Common names: white-lipped pitviper, white-lipped tree viper, more.

[Photo] White-lipped Tree Viper (Trimeresurus albolabris). Photographer: LA Dawson (http://en.wikipedia.org/wiki/User:Dawson)

Trimeresurus albolabris is a venomous pit viper species found in Southeast Asia. Three subspecies are currently recognized, including the nominate race described here.

Description
Total length males 600 mm, females 810; tail length males 120 mm, females 130 mm.

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. The supraoculars are narrow, occasionally enlarged and undivided with 8-12 interocular scales between them. Temporal scales smooth.

Midbody has 21 (rarely 19) longitudinal scale rows. The ventral scales are 155-166 in males, 152-176 in females. The subcaudals are paired, 60-72 in males, 49-66 in females. The hemipenes are without spines.

Color pattern: green above, the side of the head below the eyes is yellow, white or pale green, much lighter than rest of head. The belly is green, yellowish or white below. A light ventrolateral stripe present in all males, but absent in females. The end of tail not mottled brown.

Common names
White-lipped pitviper, white-lipped tree viper, white-lipped bamboo viper.

Geographic range
Found in northern India (Assam), Nicobar Islands, Myanmar, Thailand, Cambodia, Laos, Vietnam, southern China (Fukien, Hainan, Kwangsi, Kwantung), Hong Kong, West Malaysia, Indonesia (Sumatra, Borneo, Sulawesi, Java, Madoera, Lombok, Sumbawa, Komodo, Flores, Sumba, Roti, Timor, Kisar, Wetar). The type locality given is "China".

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http://en.wikipedia.org/wiki/Trimeresurus_albolabris

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