Zoosystema
47 (4) - Pages 51-73The nomiine bee genus Maculonomia Wu, 1982 is reported from Vietnam, with five species recognized, all belonging to the subgenus Maculonomia s. str. Three species are described as new to science: Maculonomia (Maculonomia) alveolus Engel &Tran, n. sp., M. (M.) ferruginea Engel, Tran & Nguyen, n. sp., and M. (M.) rufomysteria Engel, Tran, & A.D. Nguyen, n. sp. One species is new for the Vietnamese fauna: M. (M.) rufocaudata (Wu, 1988) while M. (M.) terminata (Smith, 1875) is found to be the most common species in the country. A new subgenus is established, Spanionomia Engel &Tran, n. subgen., and key to subgenera provided. A key is presented to the Vietnamese species of Maculonomia s. str.