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Show 1 9 0 5 .] OF PHYTOPHAGOUS COLEOPTERA. 4 4 3 ancl fourth joints equal; thorax scarcely more than twice as broad as long, the sides with well-marked flattened margins, feebly rounded, anterior angles not produced, the surface impunctate, testaceous ; scutellum piceous ; elytra visibly punctured only when seen under a very strong lens, with narrow flattened margins, testaceous, with two transverse nearly black bands, the first at the base, of somewhat triangular shape, and connected at the suture with another broader band below the middle, not extending to the apex, neither of the bands extends quite to the lateral margins ; breast and abdomen black, legs testaceous. Hab. Bolivia. A small and very variable species, in which the nearly black vertex of the head seems to be the only constant character so far as coloration is concerned. The description is based on a specimen in which the elytral bands are mostly developed ; the elytra in this form may be described as black, with the lateral and apical margins, as well as a slightly oblique transverse band at the middle, testaceous, this band not extending to the suture ; in this specimen the posterior tibiae and tarsi are black. In the var. a the dark bands are smaller and disconnected, and the posterior one is in shape of an oblong patch on each elytron; in var. b there is only a black spot near the scutellum and an elongate larger one placed near the suture below the middle ; while in var. c the elytra are entirely unspotted. In all these forms, however, the base of the head and the underside remain black. O e d io n y ch is jenea, sp. n. (Clark, MS.). Fulvous ; thorax flavous, the sides broadly sulcate ; elytra very convex and strongly widened at the middle, minutely punctured, a transverse band at the base and another one, narrowed at the suture and not extending to either margin, violaceous blue. Length 8 millim. Head fulvous, impunctate, frontal elevations narrow and transverse, carina acute, eyes not closely approached ; antennae with the third joint much shorter than the fourth, fulvous (the other joints wanting); thorax more than twice as broad as long, the sides strongly rounded and broadly sulcate, the anterior angles slightly mucronate and strongly thickened, posterior margin sinuate at each side, the disc impunctate, flavous; scutellum fusco-violaceous; elytra strongly widened and convex, flavous, with a broad transverse band at the base not extending to the lateral margins, of violaceous-blue colour, but more or less dark fulvous when viewed sideways, another band, rather suddenly widened at its outer end, is placed below the middle but does not extend to either margin; the flavous portion separating these bands is of about the same width as the bands themselves ; breast and the femora dark fulvous, tibiae and tarsi flavous ; metatarsus a ery short, claw-joint strongly swollen. Hab. Ega, Amazon {Bates). The description of this species is based on a specimen named |