OCR Text |
Show 1905.] OP PHYTOPHAGOUS COLEOPTERA. 431 O ed io n y ch is c e n t r om a c u l a t a , sp. n . (Plate XV. fig. 2 .) Testaceous or fulvous; antennae (the apical joints excepted) black; thorax impunctate ; elytra minutely punctured, a transverse band at the base, another below the middle, obscure fulvous, the intermediate space with four small black spots. Length 6-7 millim. Head impunctate, with a deep fovea between the eyes, the latter large, closely approached ; antennae black, the lower three or four and the apical two joints fulvous, third and fourth joints equal, the following joints rather shorter ; thorax with rather strongly rounded sides, the latter broadly flattened, anterior angles mucronate, tlie disc impunctate, obscure fulvous ; elytra widened at the middle, distinctly margined, extremely finely punctured at the base, fulvous, this colour divided at the middle by a narrow testaceous transverse band in which four black spots are placed transversely; under side and legs testaceous ; prosternum in the male strongly convex anteriorly. Hab. St. Catharina, Brazil. Quite distinct in its system of coloration from any other species. Two specimens are before me. O e d io n y ch is a r c u a to f a sc ia t a , sp. n. (Plate XY. fig. 7.) Ovate, subdepressed, greenish testaceous ; thorax impunctate, with rounded sides; elytra scarcely perceptibly punctured, the basal margin, a narrow semicircular band at the base, a spot at the lateral and another near the sutural margins below the middle, black. Length 5 millim. Head impunctate, eyes large, frontal tubercles subquadrate, short, carina acute; antennae extending to the middle of the elytra, testaceous, the third and fourth joints equal, terminal joint rather more robust; thorax quite twice as broad as long, of equal width, the sides moderately rounded, the lateral sulci deep, rather narrow, the base with another obsolete transverse groove, the surface impunctate ; scutellum black ; elytra widened towards the middle, rather flattened, pale greenish testaceous, with a few minute punctures (only visible under a strong lens), the extreme basal margin as far as the shoulders and a transverse semicircular narrow band below the base black ; this band extends upwards along the suture to the scutellum, it is suddenly constricted at its middle and does not extend to the lateral margins, near the latter is another black spot, below the middle and a little lower a second one is placed near the suture ; under side and legs testaceous. Hab. Chilpancingo, Mexico. I formerly looked upon this species as a variety of 0. 13-macu-lata Jac., but a further careful examination has convinced me that it really represents another form, as the colour of the antennas, shape and number of the elytral spots are different and exactly similar in the two specimens before me; this species is also of a less rounded and smaller shape. |