Two adult specimens, male and female, of Micropterna lateralis (Stephens, 1837) were found in a light trap at the Forestry Research Institute at Mógilsá in Kollafjördur, 20 km north of Reykjavik on 23–30 July 2008. Light traps have been operated at two sites in south and south-east Iceland since 1995 and at Mógilsá in south-west Iceland since 2005. Streams in all parts of Iceland were surveyed in 2004–2006 for Trichoptera species. Larvae of this species have not been found yet, and these are the only specimens obtained so far. This recent addition to the Trichoptera fauna is probably not associated with global warming, as this species is found much further north in Norway.