| Summary: | Abstract Four new species are described: Xystochroma luteotarsis sp. nov. (Cerambycinae, Callichromatini), from Ecuador; Psyrassa tysoni sp. nov. (Cerambycinae, Elaphidiini), from Guatemala; Bisaltes (Bisaltes) lateralis sp. nov. (Lamiinae, Apomecynini), from Ecuador; and Nagma hovorei sp. nov. (Lamiinae, Calliini), from Ecuador. A key to species of Xystochroma Schmidt, 1924 is provided and Psyrassa tysoni sp. nov. is included in a previous key. Variation in the pubescent pattern of Rosalba strandi (Breuning, 1943) is reported and the species is newly recorded for Paraguay. Chromatic variation in Cyrtinus umbus Martins & Galileo, 2009 (Lamiinae, Cyrtinini) is provided and the species is redescribed based on a dark specimen; a new province record (Puntarenas, Costa Rica) and a new country record (Panama) are included. Chromatic variation and sexual dimorphism in Phaea quadrimaculata Wappes & Santos-Silva, 2021 (Lamiinae, Tetraopini) is reported, and a new Mexican state record (Oaxaca) is provided.
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