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Show 284 MR. M. JACOBY ON COLEOPTERA [May 21, DIABROTICA SIMPLICIPENNIS, n. sp. Ovate, dilated posteriorly, black ; thorax transverse, testaceous ; elytra very minutely punctured, testaceous. Length 2 lines. Head black, impressed with a fovea at the middle of the vertex, the clypeus sparingly clothed with whitish hairs ; antenna? two thirds the length of the body, black, the third and fourth joints elongate ; thorax twice as broad as long, impunctate, impressed with a rather deep fovea at each side; scutellum black ; elytra rather strongly dilated posteriorly, extremely finely punctured ; underside and legs black. Corozal and Colonia Tovar. Allied to B. robusta, Baly, but differing in the black head and underside and in the entirely testaceous elytra ; from D. dilatata, Jac, the present species differs in the testaceous not black thorax. DIABROTICA ATOMARIA, n. sp. Fulvous ; the head and the breast black ; second and third joints of the antennae very short; thorax finely punctured, non-foveolate ; elytra flavous, closely punctured, a triangular spot on the shoulders, another at the middle, and two spots near the apex, black. Length 2 lines. Head impunctate, black, shining, with a fovea between the antennae ; the frontal elevations small but very distinct; clypeus with a central ridge ; antennae about half the length of the body, entirely fulvous, the second and third joints very small and equal, the fourth as long as the three preceding joints together; thorax about one half broader than long, the sides straight at the base, rather suddenly rounded before the middle, the surface without depressions, very finely and irregularly punctured, fulvous, shining ; scutellum black; elytra slightly widened posteriorly, very closely and rather strongly punctured, flavous, the suture below the scutellum, a triangular spot on the shoulder, a rounded spot at the middle, and two smaller spots placed transversely near the apex, black ; legs fulvous; breast black. Caracas. Two specimens. Allied to D. spilota, Baly, and several other species, but differing in the position and shape of the elytral spots and their stronger punctuation ; of the spots the middle one is placed close to the lateral margins and the two apical spots are nearly joined, forming a semicrescent. DIABROTICA BIMACULATA, Baly. San Esteban. DIABROTICA NIGROSTRIATA, Baly. San Esteban. DIABROTICA OBTIVA, Erichs. Two specimens from Caracas which I refer to this species (having |
