Appearance
Like most Nineta this species is fairly large for a (European) Lacewing and has no obvious markings on the head and a the first cross vein Rs-M joining M along the side of the cell Im (unlike Chrysoperla or Peyerimhoffina). The fore edge of the wing (costa) is concave, but sometimes only slightly so (a feature share with N. principae). The veins in the wing are completely green with only the cross veins in the costal field sometimes a tad darker at the base (in N. principae these are clearly black at the base as well as at the top). The (first, larger antenna segmentis (scape/scapus) is slightly longer than wide, but clearly not two times as long as wide as it would be in N. vittata.
Distribution
This species is recorded from large parts of western Europe and considered "common" even if records are usually few and spotty.References:
Some text fragments are auto parsed from Wikipedia.
https://old.waarneming.nl/soort/info/81390