Ceratopogonidae, or biting midges, are a family of small flies (1–4 mm long) in the order Diptera. They are also known as no-see-ums, midgies, sand flies, punkies, and others in North America, and sandflies in Australia. They are closely related to the Chironomidae, Simuliidae (or black flies), and Thaumaleidae. The smaller members of the family are tiny enough to pass through the apertures in typical window screens. Camping tents are often equipped with extra-fine mesh netting, called no-see-um nets, to keep the pests out. They are known to spread Tete virus.