Aspidura trachyprocta, the common rough-sided snake, known as දලව මැඩිල්ලා (dalawa medilla) in Sinhala, is a colubrid species endemic to Sri Lanka.

A commonly encountered small burrowing snake from midhills to montane limits of central Sri Lanka.

Localities recorded are Gammaduwa, Monaragala, Labukele, Nuwara Eliya, Harasbedda, Eskdale, Central Kandy, Pundaluoya, Longton Estate, Diyagama Estate, Nanu Oya, Sita Eliya, Ambewela, Pattipola, Hakgala, Horton Plains National Park, Namunukula, Kandy, Radella, Ramboda, and Diyatalawa at elevations of 750-2100m.

Dorsum range from blackish brown to light reddish brown, with lateral stripes and 2–3 rows of dark dorsal spots.

Found in piles of humus, leaf litter and rotten timber, within agricultural lands.