New species and illustrated key of Macraspis (Scarabaeidae, Rutelinae, Rutelini) from the Amazon biome of Brazil.

The phytophagous scarab genus Macraspis MacLeay (Scarabaeidae, Rutelinae, Rutelini) is reviewed from the Brazilian Amazon region. Three new species are described and illustrated from the states of Amazonas, Pará, and Rondônia: M.buehrnheimi sp. nov. , M.opala sp. nov. , and M.phallocardia sp. nov. Two species, Macraspisfernandezi Neita-Moreno and M.oblonga Burmeister, are recorded for the first time in Brazil (new country records). Macraspismaculatacrosarai Soula is a new synonym of Macraspismaculata Burmeister; hence this species no longer includes subspecies. Furthermore, Macraspiscinctaparensis Soula, 2005 is deemed unavailable under the provisions of ICZN Articles 16.4.1 and 16.4.2. An illustrated key to 15 species and subspecies of Macraspis from the Brazilian Amazon enables identification of this speciose leaf chafer genus.