The Ctenoplectridae are characterized by short tongues, modified scope, and large comb-like tibial spurs adapted to collect and carry a mixture of floral oils and pollen collect floral oil, pollen, and nectar from a few genera of the family Cucurbitaceae. However, three species are thought to be kleptoparasites. A family Fideliinae of bees that is diverse throughout the world. The bees belonging to this group have diversified nesting behavior, being able to build their babies in pre-existing cavities such as woods, rocks, and alone. Large, very rare, fast-flying, ground-nesting solitary bees. The Oxaeidae are restricted to the New World and there are several species in the Tropics. Apparently, all of its species are solitary. Bees have tegumentary exocrine glands in the abdomen, the tergal glands, distributed dorsally and the sternal glands ventrally. The Stenotritidae are large, densely hairy bees, that fly at high speed and make simple nests on the ground. They place masses of ovoid stores in the cells. These are arranged in rows and are covered with a waterproof secretion. The larvae do not spin cocoons. This work studies the biology, ecology, and taxonomy of the parasitoids of the families of bee Ctenoplectridae, Fideliidae, Oxaeidae, and Stenotritidae. In terms of the type of research source, we worked with scientific articles published in national and international journals. This modality of production, in addition to being commonly the most valued in the set of bibliographic production, is the most easily accessed. Access to articles was through virtual libraries such as SciELO, the University of São Paulo, Latin American Literature, and the University of Brasilia.