* F. diplophthalma (Axelson, 1902)

– Isotoma diplophthalma Axelson, 1902: 106

AK Bohnsack 1968, cf.; Challet & Bohnsack 1968, cf.; MacLean et al. 1977, 1978; Christiansen & Bellinger 1980, 1998; Danks 1981; Ryan 1981; Toda & Tanno 1983; Skidmore 1995

YT Hammer 1953

NT Hammer 1953; Toda & Tanno 1983; Skidmore 1995

NU Hammer 1953; Mills & Richards 1953; Oliver 1963; Danks 1981; Fjellberg 1986, 1994; Babenko 1993; Babenko & Bulavintsev 1997; Niwranski et al. 2002

MB McClure 1943; Hammer 1953; Skidmore 1995

Remarks: After redescription of F. diplophthalma types (Potapov & Dunger 2000), it became clear that

reliable records of this species are restricted to northern regions of the mid-Palaearctic. As for the Nearctic records

above, they belong either to F. palaearctica Potapov & Babenko, 2000, or to some species related to F. taimyrica Martynova, 1973 . General distribution: Palaearctic.