Synanthedon spheciformis (Denis & Schiffermüller, 1775)
on Alnus, Betula
The larva makes an u to 30 cm long tunnel in the wood of the lower part a young tree. The presence of the larva is betrayed by a mass of reddish, later brownish yellow sawdust that is extruded from the gallery.
Most records by far come from Alnus.
The larva lives for two or three years. Pupation in spring in the gallery, not in a cocoon.
distribution within Europe
Larva and pupa are extensively described by Bąkowski.
Aistleitner (2004a), Bachelard (2014a), Bąkowski (2013b), Bąkowski, Celadyn, Hołowiński & Zajda (2011a), Bartsch (1992a), Ebert (ed., 1997a), Kusdas & Reichl (eds, 1974a), Laštůvka & Laštůvka (2001a, 2014c), Predovnik (2018a), De Prins & Steeman (2011a), Sage (2005a).