Whittleia retiella (Newman, 1847)
on Festuca, Puccinellia
case (from Rickert)
Larvae free on the plants, living in a silken case that is entirely covered by pieces of grass; pupation in the case.
distribution within Europe
Lepiforum (2019), Rickert (2010a, 2011a), Wegner (2010a, 2013a).