The taxonomic identity of Trigona lacteipennis Friese, 1900 and description of a new bee species of the Trigona cilipes (Fabricius, 1804) group (Hymenoptera: Apidae: Meliponini).

A critical study of type material for Trigona lacteipennis Friese, 1900 and allied species is presented along with a discussion of literature data. This work reveals that T. lacteipennis is a junior subjective synonym of Melipona paupera Provancher, 1889 (new synonymy), a species currently classified placed in the genus Frieseomelitta.

Revision of the Tetragona clavipes (Fabricius, 1804) species-group (Hymenoptera: Apidae: Meliponini).

The Neotropical bee genus Tetragona Lepeletier Serville, 1828 is characterized among stingless bees by having a yellow pigmented maculation on body, especially on the clypeus, lower region of the paraocular area and mesosome, velvety genal area, a long and slender mesotibial spur and a glabrous propodeal triangle. The T. clavipes species-group is mainly characterized by having workers with elongated setae on T6, with about 2x the length of setae on T5 and hyaline wings.