Thrypticus bellus Loew, 1969
Pale coloured corridor (here and there with even paler segments). Pupation within the mine.
But see the note below.
Larvae in September-October (Hering, 1957a).
BE recorded (Meuffels, Pollet & Grootaert, 1991a).
NE recorded (de Meijere, 1939a).
LUX not recorded (Fauna Europaea, 2008).
distribution within Europe
Entire Europe (Fauna Europaea, 2008).
Body segments with thick transverse ridges, that bear small teeth, enabling the larva to brace itself in the mine. Not only the anterior and posterior pairs of spiracula, known in the Acalyptrate Diptera are present, but also six pairs inbetween.
Waitzbauer ao give a very different picture of the biology. According to them the larvae make a long vertical gallery at the inside of them culm of Phragmites australis, often running from internode to the other. The larvae are full-grown in August, then enter diapause; pupation after the hibernation.
Bellstedt, Stark & Meyer (1999a), Hering (1957a), de Meijere (1939a), Meuffels (2002a), Meuffels, Pollet & Grootaert (1991a), Nartshuk (2011a), Robbins (1991a), Waitzbauer, Pruscha & Picher (1972a).