Tetramesa brevicornis (Walker, 1832)
Festuca ovina subsp. guestfalica, Belgium, prov. Liège, Plombières~Haldes, Calaminaires de Plombières, 11.vii.2018 © Carina Van Steenwinkel
contrary to the published descriptions, the culm above the gall was developed normally; also the gall was not ribbed lengthwise.
the gall contained 3, perhaps 4, partly overlapping gall chambers
Inside wall of the culm with one or more, sometimes several tens, galls in shape and size similar to a grain of rice, each with a pupa or a white larva. The gall is lengthwise ribbed. Above the galled region the plant is stunted. The larvae pupate in autumn in the gall.
Festuca ovina & subsp. guestfalica, rubra, stricta subsp. sulcata.
Harmolita, Tetramesa ruschkai Hedicke, 1921
Buhr (1964a), Claridge (1961a), Jalink (1985a), Popescu (2004a), Redfern & Shirley (2011a).