Chamaesphecia nigrifrons (Le Cerf, 1911)
The larva bores in the roots. In the autumn the larva makes a short up in the
base of stem, all the while extruding a large quantity of reddish brown sawdust of of its mine. At the top of the vertical tunnel the plant is severed and mostly breaks off. The larva hibernates in the stump and pupates there in the spring.
Hypericum hirsutum, perforatum.
The larva lives one year.
distribution within Europe
Larva and pupa are extensively described by Bąkowski.
Chamaesphecia sevenari Lipthai, 1961.
Bachelard (2014a), Bąkowski (2013b), Bąkowski & Hołowinski (2010a), Ebert (ed., 1997a), Lantz (2015a), Laštůvka & Laštůvka (2001a), Predovnik (2005a, 2010a), Pühringer (2004a), Špatenka (1987a), Špatenka & Laštůvka (1983a), Steeman & Sierens (2018a).