Hydrellia thoracica Haliday, 1839
Flat green corridors in the leaves. For the moment the only character to separate this species from Hydrellia griseola is that adult flies of griseola are dusted greyish-white, those of thoracica not dusted, greyish brown (Hering, 1957a).
Glyceria fluitans, maxima.
Larvae in April (Hering, 1957a).
BE recorded (Gosseries, 1991d).
NE recorded (de Meijere, 1939a).
LUX not recorded (Fauna Europaea, 2007).
distribution within Europe
From Scandinavia to the Pyrenees, Italy and Bulgaria, and from Ireland to Poland (Fauna Europaea, 2007).
Hydrellia glyceriae Hendel, 1926.
Beuk & Zatwarnicki (2002a), Buhr (1933a), Gosseries (1991d), Hering (1925b, 1957a), Hollman-Schirrmacher & Zatwarnicki (1999a), de Meijere (1939a), Starý (1930a).