|15 genera, ca. 50 species|
Pallopteridae, or flutter-wing flies (or trembling-wing, or waving-wing flies, because of the striking vibration of the wings in many species) is a family of Diptera. Over 50 species in 15 genera are found in the temperate regions of the Northern and Southern hemispheres.
Little is known. Adults have been found on flowers and low hanging branches in shady habits. Known larvae are phytophagous or carnivorous (some species preying on beetles - Cerambycidae and Scolytidae. One species is recorded as preying on larvae of Cecidomyiidae. Some have been found in flower buds and stems.
For terms see Morphology of Diptera
Medium-sized or relatively small flies with spots on wings (dark smoky apical spot in Palloptera ustulata).Wings considerably longer than abdomen.The head is semispherical and the postvertical bristles on the head are parallel or divergent. Vibrissae on head are absent. The arista is bare or with short pubescence. The mesonotom has four to six pairs of dorso-central bristles. Tibiae without subapical bristles.The costa is interrupted near the end of the subcosta.The subcosta reaches the costa.Subcosta complete and well separated from Vein 1.The lower corner of anal cell not beoming a sharp point. The cross vein closing the anal cell is usually convex and the angle the cross vein closing anal cell makes with vein 6 more than 90 degrees. See 
- Czerny, L., 1927:in Lindner,E. 53a. Helomyzidae, 53b. Trichoscelidae und 53c. Chiromyidae, in: Die Fliegen der palaearktischen Region., Stuttgart. Keys genera.
- Morge, G., 1967 Die Lonchaeidae und Pallopteridae Österreichs und der Angrenzenden Gebiete. 2. Teil: Die Pallopteridae. Naturkundliches Jahrbuch der Stadt Linz 13: 141-212.
- Séguy, E., 1934 Diptères: Brachycères. T.II. Muscidae acalypterae, Scatophagidae. Paris: Éditions Faune de France 28.BibliothequeVirtuelleNumerique pdf
- Shtakel'berg, A.A. Family Pallopteridae in Bei-Bienko, G. Ya, 1988 Keys to the insects of the European Part of the USSR Volume 5 (Diptera) Part 2 English edition.Keys to Palaearctic species but now needs revision .
Five species in 4 genera are recorded in the fossil record of this family.
Data related to Pallopteridae at Wikispecies
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