Revision of the Black Fungus Gnats (Diptera: Sciaridae) of North America

The North American fauna of Black Fungus Gnats (Diptera: Sciaroidea: Sciaridae) currently comprises
25 genera and 166 species (including 8 species incertae sedis). 82 species are distributed only
in the Nearctic and 67 species in the Holarctic, 1 species in the Holarctic/Neotropical Regions and
8 species in North and Central America including the Caribbean islands. 223 species-group names
have been applied to taxa occurring in North America (north of Mexico). These were described or
have been reported from North America (USA and Canada) since 1827. For these names, 42 new
species-group combinations, 60 new species-group synonyms, and one new genus-group synonym
are here proposed. Two species remain unplaced but have been redescribed and figured, whereas
six species-group names cannot be interpreted (one described by CURRAN, three by FITCH, one
by KIEFFER, one by WALKER). Seven species-group names from SAY are considered to be nomina
dubia. Twelve species-group names described or reported from Greenland have been excluded
from this revision (section 10).