OCR Text |
Show 1889.] COLLECTED IN VENEZUELA. 283 a rounded spot before and another below the middle, obscure piceous. Var. The anterior elytral spot absent. Length 2-2| lines. Head obscure testaceous, the vertex impunctate, the lower part vertical, the clypeus with a central ridge ; labrum black; antenna? more than two thirds the length of the body, testaceous, the basal three joints piceous, the third joint distinctly longer than the second but shorter than the fourth joint ; thorax one half broader than long, narrowed towards the base, the disk fiat, with a transverse depression near the base, finely punctured and somewhat rugose or finely wrinkled ; scutellum piceous ; elytra flattened, slightly widened posteriorly, the sides with a longitudinal ridge commencing at the shoulder and extending below the middle, the surface finely and closely punctured and rugose, a small rounded spot near the base and a larger one below the middle as well as the suture anteriorly, piceous ; underside and legs testaceous, the tibia? and tarsi sometimes piceous. Colonia Tovar. The long antenna?, finely rugose thorax and elytra, in connexion with their pattern are the principal characteristic distinctions of this species; although there is only one typical and three specimens representing the variety before me, I think that the former probably represents the normally coloured form. DIABROTICA NIGRODORSATA, n. sp. Flavous ; the head, scutellum, and the sides of the breast black ; thorax fulvous, bifoveolate ; elytra closely punctured, black, narrowly margined with flavous. Male. Head deeply excavated below the antennae. Length 2-2| lines. Head black, impunctate ; antennae two thirds the length of the body, pale flavous, the apical four joints piceous, third joint elongate, as long as the fourth; thorax about one half broader than long, fulvous, stained with piceous, the disk impunctate, with two deep foveae ; scutellum black; elytra closely and strongly punctured, black, the posterior portion of the sutural, the lateral and basal margin narrowly and the apical one more broadly flavous ; legs and abdomen flavous. Colonia Tovar. The female has a simple, not excavated head; in both sexes the basal flavous margin is irregularly notched at its posterior edge. DIABROTICA BOLIVIANA, Harold. San Esteban. Three specimens. DIABROTICA ROBUSTA, Baly. A single specimen from San Esteban. DIABROTICA SERRATICORNIS, Baly. A single specimen from San Esteban. |