Tachypodoiulus niger, known variously as the white-legged snake millipede or the black millipede, is a European species of millipede. It is very similar to other species such as Cylindroiulus londinensis, from which it can be reliably distinguished only by studying the shape of the telson. It occurs in the British Isles, Spain, France, Benelux, Germany, Switzerland, Austria and the Czech Republic, and is especially common on chalky and limestone soils.