OCR Text |
Show 408 MR. MARTIN JACOBY ON NEAV SPECIES OF [Dec. 13, the third and fourth joints equal; thorax twice as broad as long, the sides subangularly rounded before the middle, constricted near the base, the anterior angles blunt, the posterior ones acute, the surface with a rather deep, transverse, sinuate sulcus near the base, extending to the sides, the disc impunctate ; elytra wider at the base than the thorax, transversely depressed below the latter, very closely and distinctly punctured, the punctures somewhat regularly arranged in rows, the ground-colour of a pale greenish-testaceous, the base with two elongate black spots, one near the margin, the other near the scutellum and extending nearly to the middle of the elytra, another round black spot is placed near the apex ; underside and legs coloured like the upper surface. flab. Marcapata, Peru. I possess five similarly marked specimens of this distinct species. S y s t e x a m e l a n o c e ph a l a , sp. n. Flavous, the head, the terminal joints of the antennae, and the breast black ; thorax impunctate, flavous ; elytra, extremely minutely punctured, flavous, the suture at the base, a humeral spot and a transverse band near the apex black. Length 8 millim. Head impunctate, very shining, black, the frontal elevations and the clypeus flavous ; antenna? extending to the middle of the elytra, flavous, the apical four joints black, third joint one-half shorter than the fourth ; thorax one-half broader than long, the sides nearly straight, the anterior angles thickened, posterior ones distinct, the surface very obsoletely sulcate near the base, extremely minutely punctured, flavous, shining; scutellum black ; elytra punctured like the thorax, flavous, a narrow sutural stripe at the base and a subtriangular humeral spot as well as a transverse band near the apex black, this band extends down the suture to the apex, its posterior edge is consequently deeply concave ; underside and legs flavous, the breast and the tarsi black. IIab. Marcapata, Peru. A single specimen is contained in my collection. This species much resembles in its elytra! markings certain forms of Diabrotica. S y s t e x a a r g e n t in e n s is , sp. n. Testaceous, sides of the thorax with a black stripe; elytra minutely punctured, the suture, a submarginal, medially widened stripe, and a spot at the base and near the apex black. Length 5 millim. Head broad, pale fulvous, microscopically punctured, without any tubercles or ridges ; clypeus pale flavous, deflexed ; antennae not extending to the middle of the elytra, testaceous, the third and fourth joints elongate and equal, terminal joints distinctly shorter; thorax subquadrate, about one-half broader than long, with a very obsolete transverse depression near the base, impunctate, the sides with a narrow longitudinal black stripe; elytra very finely punctured, testaceous, a sutural band,' not extendinog |