OCR Text |
Show 1905.] OF PHYTOPHAGOUS COLEOPTERA. 459 Elytra otherwise marked. O e d io n y ch is b ic o lo r a t a , sp. n. Testaceous; the head, antennfe, breast, and the legs black; thorax impunctate, the anterior angles produced ; elytra extremely minutely punctured, the anterior two-thirds metallic greenish-teneous, the rest testaceous. Length 7 millim. Head with some fine punctures at the vertex, the frontal elevations pyriform ; clypeus flavous, strongly transversely raised ; antennfe black, the basal joint elongate, strongly widened anteriorly, third joint shorter than the fourth ; thorax rather strongly narrowed anteriorly, the sides nearly straight, the anterior angles much produced and pointed, the sides broadly flattened, the surface impunctate, testaceous; scutellum black; elytra very feebly depressed below the base, very minutely and closely punctured, the anterior portion to below the middle metallic greenish, this colour not quite extending to the lateral margins and divided by a straight line from the apical testaceous portion ; the breast and legs black ; the abdomen testaceous. Hab. Banos, Ecuador. This is a peculiarly marked species, of which I know only a single specimen. The thorax has the sides less rounded than is usually the case and the angles much produced ; these differences distinguish the species from 0. bolivianus Jac., previously described, which must find its place in Asphcera, as the metatarsus of the hind legs is decidedly elongate; otherwise the coloration of the elytra nearly resembles that of the present species, except that the metallic colour of the latter occupies only the anterior half of the elytra. O e d io n y ch is n ig r o b a sa l is , sp. n. Testaceous, the intermediate joints of the antennfe black; thorax impunctate ; elytra very finely punctured, a transverse band at the base and another one near the apex fulvous, the extreme basal margin black. Length 7-8 millim. Head impunctate, testaceous or pale fulvous; eyes very large, rather closely approached; antennfe with the four basal and the two apical joints testaceous, the others black, third and fourth joints equal; thorax with very broadly flattened sides, the lateral margins rounded, the anterior angles produced outwards into a small tooth, the surface entirely impunctate, testaceous; scutellum blackish at the base; elytra testaceous, with a transverse fulvous band at the base ; this band is concave at its posterior edge and extends generally downwards in a narrow stripe along the suture, where it is connected with another broad transverse band near the apex, neither of them extends to the lateral margins, and the posterior band is sometimes reduced to a round spot |