Hydrellia concolor (Stenhammer, 1844)
A whitish corridor without recognisable frass, initially superficial, later deeper. Pupation in the mine, in the pith of the leaf or flower stalk. It is connected to the outside world by a previously made exit hole (Hering, 1925a).
Larvae in July (Hering, 1957a).
Not known from the Benelux countries (Fauna Europaea, 2007).
distribution within Europe
From Scandinavia to Austria, and from the UK to Poland (Fauna Europaea, 2007).
Hyaline, initially greenish, later brownish. Difficult to find, look for the exit openings.
Hydrellia butomi Hering, 1925.
Hering (1924b, 1925b, 1957a), Hollman-Schirmacher & Zatwarnicki (1999a), Zatwarnicki (1988a).