Early naturalists have suggested its resemblance to the venomous common krait as an instance of Batesian mimicry.

Snout broad, much depressed, long, spatulate, with the upper lip swollen, and without canthus rostralis.

Nostril small, directed upwards, between two nasals, the anterior of which is situated on the foremost part of the snout.

Each maxillary is armed with two fangs in front, placed in a transverse line, the outer being much larger than the inner; the lateral longitudinal series of teeth commences at some distance from the fangs; they are small, from four to twelve in number, the last being considerably larger than the others; pterygoido-palatine teeth small, of equal size; mandible with two or three fangs on each side and with a series of small teeth.

The following description is from Boulenger's Fauna of British India, Reptilia and Batrachia volume (1890): Snout much depressed, with swollen lips, spatulate in the adult; eye rather small.

Rostral much broader than long, just visible from above: internasals much shorter than the prefrontals; frontal usually shorter than its distance from the end of the snout or than the parietals ; loreal elongate, not entering the eye; one praeocular, usually in contact with the frontal; two postoculars; temporals small, scale-like, 2+3 or 3+3; 9 upper labials, third, fourth, and fifth entering the eye; 4 or 5 lower labials in contact with the anterior chin-shields, which are longer than the posterior.

[4] Habitat: India and Ceylon, Himalayas, Burma, Siam, Malay Peninsula, Java, Philippines, Timor.

Lycodon aulicus is found in Pakistan, Sri Lanka, India (north to Himalayas and Assam; Maharashtra,Gujarat), Bangladesh, Nepal, Myanmar (= Burma).

According to Günther (1864) it is one of the most formidable enemies of the skinks, which form almost its sole food, the "fangs" in the front of its jaws being adapted for piercing and making good its hold on the hard smooth scales with which those lizards are coated.