Michanthidium almeidai, a new species from northeastern Brazil (Hymenoptera, Megachilinae)

A new species of Michanthidium Urban (Hymenoptera, Megachilinae)is described and figured from Sergipe and Bahia States, northeastern Brazil. An identification key, illustrations, and a distribution map for the three species of the genus are presented. The male genitalia of Michanthidium almeidaisp. n. and Michanthidium albitarse are illustrated and compared for the first time.