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Show 444 MR. M. JACOBY ON NEW COLEOPTERA. [May 20, Genus G^DIONYCHIS, Erichs. 11. G S D I O N Y C H I S QUADRIFASCIATA, sp. nov. Broadly ovate, black, above testaceous ; a transverse band on the disk of the thorax, and four others across the elytra, metallic violaceous blue. Length 4 lines. Head impunctate, deeply transversely impressed between the eyes, shining, piceous, lower part of face flavous, apex of labrum piceous ; antennae black, the first three joints flavous, stained with piceous above, the first joint elongate, the third and fourth joints subequal. Thorax very narrow, about four times as broad as long, its sides broadly margined and evenly rounded ; anterior angles outwardly produced, their apex rounded, basal margin sinuate on either side, disk impunctate or scarcely visibly punctured, flavous testaceous ; a black narrow band, not touching either side, extends transversely across the disk ; scutellum black, smooth, broad, its sides rounded and its apex obtuse. Elytra narrowed at the base and towards the apex, finely but distinctly and moderately closely punctured, of a testaceous colour ; a transverse band at the base, one immediately before, another behind the middle, as well as a fourth band near the apex, metallic violaceous or greenish blue; none of these bands extend quite to the lateral margins; and the intervals between them are of about half the width of the bands themselves. Underside and legs black, the margins of the abdominal segments obscure flavous; posterior thighs very thickened ; the first joint of the tarsi shorter than the two following ones united; the claw-joint very swollen. Hab. Peru. In m y collection. 12. Q^DIONYCHIS FUSCONOTATA, Sp. nOV. Ovate, widened behind, obscure piceous below, above flavous testaceous; each elytron with two small spots at the base, a transverse larger one in the middle, and another near the apex, fuscous. Length 2 lines. Head distinctly punctured, with a strongly-marked transverse groove ; antennae with joints three and four of equal length, tbe first five joints flavous, the rest piceous-coloured ; anterior angles of the thorax toothed, the posterior margin nearly straight, surface impunctate, testaceous; elytra narrowed at the base, rather flattened, more convex behind the middle, distinctly punctured, the interstices slightly wrinkled, of a flavous or testaceous colour, each elytron with four fuscous spots, of which one (the smallest) is placed at the humeral callus, another (larger one) near the scutellum, a more transversely- shaped one at the middle, slightly hollowed out at its posterior margin, and the fourth (generally the largest) also transversely placed at a little distance from the apex. Underside obscure piceous, the four anterior legs entirely flavous. Hab. Rio Janeiro. 13. ffiDIONYCHIS TRANSVERSALIS, sp. nOV. Ovate, flavous-testaceous; a transverse subquadrate band at the |