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Show 200 MR. MARTIN JACOBY ON NEW SPECIES [Mar. 4, narrowly emarginate, the anterior angles obtuse, posterior angles distinct, the base with a narrow transverse sulcus, the disc scarcely perceptibly punctured and wrinkled, black, all the margins narrowly flavous; scutellum black; elytra sculptured like the thorax, the fine punctures closely placed, the ground-colour flavous or testaceous, a rather broad longitudinal stripe near the suture, and another narrower one near the lateral margins, both abbreviated behind, black. Hab. Puebla, Mexico. Of this species, which seems to be very rare, as I did not meet with it in the numerous collections I had before m e when working out the Central American fauna, I have two exactly similar specimens now: they differ from the other species in the black thoracic band, the two posteriorly abbreviated elytral stripes, and the black underside ; of the stripes, the subsutural one is of the same width as that of the following flavous space, but the lateral one is narrower. D. discicollis Clark has a black head, differently coloured legs and elytra, the latter are black with a discoidal flavous stripe. OXYGONA BRASILIENSIS, sp. n. Testaceous or pale flavous, the antennae piceous; thorax impunctate, not strongly transverse, the angles acute ; elytra finely and closely punctured. Length 6 millim. Head broad, impunctate, without any foveae, the frontal elevations strongly raised; the clypeus triangular; the antennae piceous or fuscous, nearly extending to the end of the elytra, the third and following joints elongate, equal, terminal joints shorter ; thorax not much more than one-half broader than long, the sides rather strongly rounded anteriorly, all the angles acute, the anterior ones slightly oblique but scarcely produced, the surface smooth and shining, with a narrow margin at all the sides; scutellum more or less fuscous; elytra extremely closely and rather finely punctured, the apex nearly impunctate ; below and the legs testaceous, the metatarsus of the posterior legs elongate, the pro-sternum extremely narrow, the last abdominal segment of the male triangularly emarginate at the apex, with a narrow central groove. Hab. Espirito Santo, Brazil. I must separate this species from 0. acutangida Chev., on account of the much longer and much less transversely shaped thorax, which is very obvious when the two insects are compared in both sexes. 0. luridulus 01. and 0. simplex 01. have both flavous antennae; the former has also a medial fovea on the head, but what Clark meant by a short, deep, and broad medial marking on the head, of which he says nothing in his description, it is difficult to understand. Two specimens of the present species are in m y collection. |