I haven't found any reliable reference photos for this species, so though my photos seem to match descriptions I've read, I'm not overly confident in the ID.
This skink was observed during the day basking on a wood pile in a forested area near the town of Nilambur in the Western Ghats of southwestern India.
Location: Makunda Christian Hospital, Karimganj District, Assam
Date: 17th June 2013
Equipment: Nikon D300s with Micro-Nikkor 105mm
A small slender tree skink wandering on a tree trunk close to the ground. Dark orange in color, bright orange on the throat and light cream with black stripes below it's mouth.
About 10 cm snout to tail tip, in dense primary lowland dipterocarp forest.
The genus Sphenomorphus – vernacularly known as the common skinks – currently serves as a "wastebin taxon" for a large number of skinks. While most or all species presently placed here are probably rather close relatives, the genus as presently delimited is likely to be not monophyletic and is in need of review.