Athrips nigricostella is a moth of the family Gelechiidae. 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, et al. 2010: The gelechiid fauna of the southern Ural Mountains, part II: list of recorded species with taxonomic notes (Lepidoptera: Gelechiidae). Zootaxa, 2367: 1–68. Preview China (Xinjiang) and Japan., 2005: A review of the genus Athrips (Lepidoptera: Gelechiidae) in the Palaearctic region . Deutsche Entomologische Zeitschrift 52 (1): 3-71.
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.
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