Elachista herrichii
{{Short description|Species of moth}}
{{Speciesbox
| image = Elachista herrichii.jpg
| genus = Elachista
| species = herrichii
| authority = Frey, 1859{{cite web|url= http://www.faunaeur.org/full_results.php?id=435484|archive-url= https://web.archive.org/web/20121015115306/http://www.faunaeur.org/full_results.php?id=435484|url-status= dead|archive-date= October 15, 2012|title=Elachista (Elachista) herrichii Frey, 1859|publisher=Fauna Europaea|version=2.6.2|date=August 29, 2013|access-date=November 9, 2013}}
| synonyms =
- Elachista reuttiana Frey, 1859
- Poeciloptilia obscurella Herrich-Schäffer, 1855
- Elachista obscurella (Herrich-Schäffer, 1855)
}}
Elachista herrichii is a moth of the family Elachistidae. It is found from the Baltic region to the Pyrenees, Italy and Romania.
The larvae feed on Agrostis, Bromus pannonicus, Festuca arvernensis, Holcus, Koeleria glauca and Koeleria macrantha. They mine the leaves of their host plant.{{cite web|url=http://www.bladmineerders.nl/minersf/lepidopteramin/elachista/herrichii/herrichii.htm|title=Elachista herrichii Frey, 1859|publisher=Bladmineerders.nl|access-date=September 13, 2011|archive-url=https://web.archive.org/web/20120927000405/http://www.bladmineerders.nl/minersf/lepidopteramin/elachista/herrichii/herrichii.htm|archive-date=September 27, 2012|url-status=dead}} Larvae can be found from autumn to April or May and again from July to early August.