Several species of Neotropical Microdontinae (Diptera: Syrphidae) are mimics of stingless bees. Most of these species have previously been grouped in Ubristes Walker, 1852, with Carreramyia Doesburg, 1966, Hypselosyrphus Hull, 1937 and Stipomorpha Hull, 1945 treated as synonyms in recent literature. The species of the recently described genus Mermerizon Reemer, 2013 are also treated in the pres...

The flower fly genus Eosphaerophoria is revised. Eight new species are described (adornata sp. n. Mengual, bifida sp. n. Mengual, brunettii sp. n. Ghorpade, hermosa sp. n. Mengual, luteofasciata sp. n. Mengual, nigrovittata sp. n. Mengual, symmetrica sp. n. Mengual, and vietnamensis sp. n. Mengual), and an identification key is provided. Redescriptions, illustrations, synonymies, diagnoses and ...