The Red-veined Darter (Sympetrum fonscolombii) is a dragonfly of the genus Sympetrum. It is a common species in southern Europe and from the 1990s onwards has increasingly been found in northwest Europe, including Britain and Ireland. Its name is sometimes spelt fonscolombei instead of fonscolombii but Askew (2004) gives the latter as the correct spelling. There is genetic and behavioural evidence that S. fonscolombii is not closely related to the other members of the Sympetrum genus and will at some time in the future be removed from this genus.