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. There is variation in setal color within most species and sometimes even within an individual specimen. If the head and thoracic setae differ in color, score a specimen based on the thoracic setae.