genus MueIlerianella (Delphacidae) were studied. 2. In the field M. brevipennis and M.
faimairei are restricted to Deschampsia cespitosa and Holcus lanahis/H. mollis. respectively.
M. extrusa is mainly found on Molinia caerulea, but has also been recorded from other grass‐
species. Triploid all‐female forms which reproduce by gynogenesis usually live on Holcus
together with M. fairmairei. Other gynogenetic populations were found on Bromus ramosus …