Revision of Piezochaerus (Coleoptera: Cerambycidae)

piezochaerus and the species p. bondari melzer, 1932 (type-species) are redescribed. three new species are described from brazil: p. monnei sp. nov. (linhares, espírito santo) have dorsal pubescence whitish gray with a bluish reflection depending on the direction of illumination; basal half of the epipleuron with a spot formed by orangish pubescence; p. melzeri sp. nov. (pedra azul, minas gerais and pedro canário, espírito santo) with elytra narrower at the apex, sides converging towards the apex beginning at the basal 1/3; apex without external spine; elytral pubescence yellowish with brownish spot, developed and oblique at the base and other median; and p. marcelae sp. nov. (juiz de fora, minas gerais) with unicolor dorsal pubescence, whitish gray, elytra not depressed; bicolorous femurs, witch is orangish in the basal 2/3, dark in the apical 1/3. an illustrated key to the species is also included.