New faunistic data on fungus gnats (Diptera: Sciaroidea excluding Sciaridae) from Finland and NW Russia (Karelia and Murmansk Region) are presented. A total of 64 and 34 species are reported for the first time form Finland and Russian Karelia, respectively. Nine of the species are also new for the European fauna: Mycomya
shewelli Väisänen, 1984, Mycomya
thula Väisänen, 1984, Acnemia
trifida Zaitzev, 1982, Coelosia
gracilis Johannsen, 1912, Orfelia
krivosheinae Zaitzev, 1994, Mycetophila
biformis Maximova, 2002, Mycetophila
monstera Maximova, 2002, Mycetophila
uschaica Subbotina & Maximova, 2011 and Trichonta
palustris Maximova, 2002.