New records: Ign: Ažvinčių giria, 28 VII–30 IX 2013, coniferous dominated forest, flight interception trap, leg. V. T., 1³, KZM; Kau: Jiesios kraštovaizdžio draustinis, 24 VI 2005, leg. R. F., 1³ 4♀, KZM; Ringovės entomologinis draustinis, 14 VIII 2007, 1♀, KZM; Romainiai, 19 VI 2008, leg. R. F., 1³, KZM; Kaunas, Aukštieji Šančiai, 12 VII 2006, leg. R. F., 1³, KZM; Šak: Juškinës miškas, 6 VII 2006, leg. R. F., 1 ³, KZM; Ut: Minčios miškas, 11 VII 1999, coniferous dominated forest, leg. B. Š., 2♀, KZM.
Earlier records. This species was found in Kaunas (Ferenca 1988) (KZM), and Neringa ditricts (Šablevičius 2003) (BSC).
General distribution. This species is widely distributed in Europe, also noted from Western and Eastern Siberia (Nikitsky 2008).
Notes. This species is infrequently observed in Lithuania, ranked as very rare by Pileckis & Monsevičius (1997); however, it is regarded as the most common species of Tetratomidae in Poland (Kubisz et al. 2014). The larvae usually develop in the same fungi as H. axillaris, but additionally were reared from Postia caesia (Nikitsky & Schigel 2004), Phellinus pini, and Postia tephroleuca (Schigel et al. 2004).
Subfamily Eustrophinae Gistel, 1856
Tribe Eustrophini Gistel, 1856
Genus Eustrophus Illiger, 1802