Atividade crepuscular de Chlorotabanus inanis (Fab.) e Cryptotylus unicolor (Wied.) (Diptera : Tabanidae)

Summary Utilizing an adult horse for attraction of horse flies. Chlorotabanus inanis (Fab.) and Cryptotylus unicolor (Wied.) demonstrate flight activity for feeding only below 1,500 lux. During the day they present biphasic activity: one in the morning between 5:20 and 5:50 a.m. and the other in the ofternoon between 5:45 and 6:20 p.m., coinciding with both the rising and setting of the sun.