Deuterophlebia, also known as mountain midges are a genus of flies that are the sole living members of the small family Deuterophlebiidae.

Adults have broad, fan-shaped wings, and males have extremely long antennae which they employ when contesting territories over running water, waiting for females to hatch.

[2] Larvae occur in swiftly flowing streams and are easily recognized by their forked antennae and the prolegs on the abdomen.

[4] Fossil members of the family are known from the mid-Cretaceous Burmese amber of Myanmar, dating to around 100 million years ago.

[5] Species of the genus are known from Afghanistan, Kashmir, Northeast India, China, Japan, Korea, Eastern Siberia, and western North America from Alaska to California to Colorado.