Spoonwings or Nemopteridae are a family of neuropteran insects. They are also called Thread-winged Antlions. Their flight is delicate and they have a circling flight to avoid walls when they are trapped indoors. The long streamer is conspicuous when the insects are flying and these are the elongated and spatulate hindwings.
They are found in the Ethiopian, Palearctic, Australasian andNeotropical regions but absent in North America (a fossil has been found in Colorado).
Male Nemopterids have a bulla on the wing usually along the margin or wing base that is used to disperse pheromone.
(From Wikipedia, February 2015)