''Bibio venosus'' is a species of

fly Flies are insects of the Order (biology), order Diptera, the name being derived from the Ancient Greek, Greek δι- ''di-'' "two", and πτερόν ''pteron'' "wing". Insects of this order use only a single pair of wings to fly, the hindwing ...

in the family

Bibionidae Bibionidae (March flies) is a family of flies (Diptera) containing approximately 650–700 species worldwide. Adults are nectar feeders and emerge in numbers in spring. Because of the likelihood of adults flies being found ''in copula'', they h ...

. It is found in the

Palearctic The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa. The realm consists of several bioregions: the Euro-Sibe ...

.Séguy, E. (1940) Diptères (Nématocères). 367 p., 414 fig. Éditions ''Faune de France'' n° 36
Bibliotheque Virtuelle Numerique pdf
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References

Bibionidae Insects described in 1804 Nematoceran flies of Europe {{Bibionomorpha-stub