Melostelis gen. nov., new species and complementary notes on Anthidiini (Hymenoptera, Apidae). Melostelis gen. nov. is proposed to a new cleptoparasitic Anthidiini. Two new species, Melostelis amazonensis sp. nov. from Manaus, Amazonas and Larocarathidium chacoense sp. nov. from Porto Murtinho, Mato Grosso do Sul, are described and illustrated. The males from Epanthidium bolivianum Urban, 1995 and Epanthidium araranguense Urban, 2006, are described. The occurrences from Ketianthidum zanolae Urban, 2000 and Epanthidium bolivianum, are registred by the first time in the Brazilian Chacoan subregion.
Megachilinae; new genus; new species; neotropical; taxonomy
