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Lycodon jara
Range
Bangladesh, India (Assam, Odisha, Arunachal Pradesh, Manipur, West Bengal and parts of Uttar Pradesh) and Nepal
Size
Total length about 35cm
The twin-spotted wolf snake is a colubrid endemic to Asia, found in Bangladesh, India and Nepal. The snout is much flattened and the eye rather small, and the back scales are smooth in 17 rows. Preserved specimens are brown above, each scale with two white dots or short lengthwise lines, with white lips, usually a white collar, and a uniformly white underside (Wikipedia, general species account).
Total length is given as about 35 cm, with a tail of 6 cm. The Reptile Database lists Tripura, Sikkim, Manipur, Meghalaya, Assam, Ganjam, Bihar, Arunachal Pradesh, Uttar Pradesh and Mizoram.