The vestiture, or hairlike projections of the cuticle, include macrotrichia (setae or setulae), which have an alveolus (socket), and microtrichia, which do not have an alveolus. Setae are the large macrosetae (bristles) that occur at typical positions on the head and thorax in Anastrepha and Toxotrypana. The scutellum in Anastrepha and Toxotrypana has 1-2 pairs of setae. The basal scutellar seta is located on the lateral margin of the basal lateral half of the scutellum.

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