Athrips nigricostella is a moth of the Gelechiidae family. It is found in France, Germany, Poland, Austria, Switzerland, Italy, the Czech Republic, Slovakia, Slovenia, Hungary, Romania, Ukraine and Russia. It is also found in Turkey, Kazakhstan, Kyrgyzstan, the Russian Far East, China (Xinjiang) and Japan. The larvae feed on Medicago sativa and Medicago minima. They spin together the terminal leaves of their host plant. Pupation takes place in a white cocoon between the spun leaves.