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Delicate, small to medium-sized flies (5.0-9.0 mm) with slender body and
long legs. Body usually brown or grey, head with well developed eyes and
three ocelli. Antenna 2+14 segmented, flagellomeres filiform, elongated,
sometimes with long hairs. Wings narrow, slightly smoky, regularly with
a spot (stigma) over R1 and R4, in some species also another one over
r-m. Sc long, ending in C. R4
short, ending in C or R1
anteriorly. M
with three branches. Wing membrane with microtrichia. The larvae are white,
with head capsule strongly sclerotized, antenna three-segmented,
prothorax and seven abdominal segments with spiracles (peripneustic type).
The larvae are oligomycophagous, developing in soft or wood-decaying
fungi (Ševčík
2001); they pupate in the fungus or in the humus layer of the soil.
The pupa is free, without a web cocoon. The adults occur mostly in the
undergrowth of mixed forests, especially in mountains, and in shaded
places alongside streams. Some species aestivate and hibernate in caves.
There are about 60 species in the world, with 38 species in one genus
(two subgenera) in the Palaearctic region and 36 in Europe (Chandler
2007,
Plassmann 1988,
Søli et al. 2000,
Ševčík & Papp 2004). In the present checklist 19 species are listed, 17 species are
reported from the Czech Republic (15 from Bohemia, 16 from Moravia)
and 19 from Slovakia. Since the ECV1 (Košel
& Ševčík 2006), one
additional species was recorded in Slovakia (Ševčík 2007).
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