Indotyphlops tenuicollis
Range
Northern India; definitely known only from Nagaland
The Samagutin worm snake is a harmless blind snake found in northern India, definitely known only from Nagaland. The type locality is given as the Himalayas (Wikipedia, general species account).
The Reptile Database lists Nagaland and Meghalaya, and Myanmar. The account used here gives no further detail.