''Sylvicola fenestralis'', the window gnat, is a medium gnat (6–10 mm) of the family

Anisopodidae The Anisopodidae are a small cosmopolitan distribution, cosmopolitan family (biology), family of gnat-like Fly, flies known as wood gnats or window-gnats, with 154 described Extant taxon, extant species in 15 genera, and several described fossil ...

. It is found in the

Palearctic The Palearctic or Palaearctic is a biogeographic realm of the Earth, the largest of eight. Confined almost entirely to the Eastern Hemisphere, it stretches across Europe and Asia, north of the foothills of the Himalayas, and North Africa. Th ...

. Séguy, E. (1940) Diptères: Nématocères. Paris: Éditions Faune de Franc
Faune n° 36 Bibliothèque virtuelle numérique
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References

Anisopodidae Insects described in 1763 Diptera of Europe Taxa named by Giovanni Antonio Scopoli {{Bibionomorpha-stub