Espécies novas de Anthodioctes Holmberg e notas sobre alguns Dianthidiini (Hymenoptera, Megachilidae)

The following new species are presented: Anthodioctes rosanae sp. nov. and Anthodioctes ayalai sp. nov. from México and Anthodioctes misiutae sp. nov. from Brazil. The male of Moureanthidium bahianum Urban, 1995 and the female of Ananthidium dilmae Urban, 1990 are described by the first time. Notes and new occurrences of Anthodioctes lunatus (Smith, 1854) are given.