The present work examines the richness, abundance of nests, and annual activity of bee species nesting in trap-nests at acerola orchards in a semiarid region near Feira de Santana, Bahia State, Brazil. Collections using trap-nests were made in three orchards, between October 2008 and September 2009. Centris analis Fabricius, Centris tarsata Smith and Tetrapedia diversipes Klug used the trap-nests. Two-hundred and fifty four nests were obtained, mostly made by C analis (n=213). All three species used the 5 and the 10 cm long trap-nest tubes and nesting was more frequent in the largest (n=189) than in the smaller (n=65) tubes. Most nesting activities occurred from December 2008 through April 2009. C. analis is considered to have significant potential for the management of pollination in acerola orchards of the semiarid region in Bahia State, due to the high abundance of its nests.