The Nemestrinidae or tangle-veined flies are a small group of brachycerous flies with about 300 extant and fossil species (Evenhuis, 1994). Many of them are large to medium-sized flies with a densely pilose body. They have a unique wing venation with a compound diagonal vein which is an apomorphic character for Nemestrinidae (Yeates, 1994). The diagonal vein comprises elements of veins R, M, and Cu and it crosses the wing obliquely. Adult nemestrinids often occur in open areas and many feed on the nectar of flowers (Richter, 1997). Nemestrinid larvae appear to be internal...
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