OCR Text |
Show 1902.] OF AMERICAN COLEOPTERA. 187 Hab. Colombia, Venezuela. I know of only one other described species which has an impubescent upper surface (L. chalcoptera Har.); but in that species the carina of the head is short and blunt, the thorax is impunctate, the elytra have traces of costae and are cupreous in colour. In the female of the present species the antennae are much shorter and the elytra show a slight depression below the base; the insect is also much more robust in shape. DlSONYCHA DECEMMACULATA, sp. n. Black; thorax flavous, with four black spots; elytra strongly punctured, black, each with five flavous spots (2, 2, 1), the one near the scutellum curved ; the femora and the abdomen flavous. Length 4 millim. Head with a deep punctured groove near the eyes, black, with a flavous mark on the vertex, the frontal elevations distinct, the clypeus strongly convex, flavous ; labrum black ; antennae robust, black, the lower four joints flavous below, third joint slightly shorter than the fourth; thorax twice as broad as long, flavous, the sides straight, the anterior angles scarcely oblique, rather rounded, posterior angles oblique, the disc impunctate, with four small black spots placed transversely ; elytra strongly and closely punctured, black, each with five yellow spots, one at the humeral callus, another in shape of a D near the scutellum, two round spots at the middle and a transverse one near the apex ; the breast, the tibiae and tarsi black; femora and abdomen flavous, the apex of the posterior femora black. Hab. Pernambuco, Pery-Pery. This species will be easily recognized by the strong elytral punctuation and the outwardly curved spot near the scutellum. DlSONYCHA ELONGATA, sp. n. Elongate and subdepressed, testaceous, the terminal joints of the antennae fuscous; thorax impunctate; elytra not perceptibly punctured ; a very narrow sutural and a sublateral stripe and a broader longitudinal band at the disc, black. Length 9 millim. Head impunctate, the clypeus with an acutely raised central ridge; eyes reniform, rather deeply emarginate; antennae extending to the middle of the elytra, rather robust, fuscous, the lower four joints testaceous, the fourth joint nearly twice as long as the third ; thorax about one-half broader than long, the sides nearly straight with a narrow margin, the posterior angles strongly oblique, anterior angles obliquely truncate; scutellum black; elytra rather flattened, not perceptibly punctured, testaceous, very shining, the suture very narrowly and a slightly wider stripe close to the margins black, another much broader band extends from the middle of the base nearly to the apex; below and the legs testaceous, the apex of the posterior tibiae obscure fuscous. |