Neria commutata
Identification: Thorax: Humeri black
Head: Palpi short, not reaching the anterior part of the mouth opening. Upper (posterior) half of frons velvety black. Arista entirely pale yellow
Male with an unpaired (median flat) process of the 6th sternum projecting anteriorly between the large but slender processes (curved towards each other and semitubular but dilated knob-like at the tip) of the 5th sternum, anal "cerci" with not very long hairs; female ovipositor sheath entirely black, without a transverse row of long hairs at tip beneath. . 5 - 7mm
Distribution
Europe: Countries (published), online at Fauna Europaea, Occurrences at GBIF
UK: Recording Scheme map of occurrences 2016 (verified.) Online (NBN Atlas) via Easy maps or Interactive Atlas
Largely unknown, but probably similar to that of N. cibaria as adults of both these species often occur together in humid forested areas along rivers, creeks and pools. (Jindřich Roháček, 1990)