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Show 1887.] PHYTOPHAGOUS COLEOPTERA OF CEYLON. 109 I horax with two deep depressions, impunctate ; elytra very finely and closely punctured, sparingly pubescent. Length 2\ lines. Head impunctate, with a deep triangular fovea between the eyes. Antennae as long as the body, tbe third to the ninth joints furnished with slender and long appendages, the tenth triangularly widened and compressed, emarginate at its outer side, the eleventh and twelfth joints simple. Thorax twice as broad as long, the sides constricted near the base, the surface with a transverse groove at each side nearly extending to the middle, entirely impunctate. Scutellum triangular. Elytra parallel with a small depression immediately below the scutellum, extremely finely punctured, the interstices furnished here and there with single stiff hairs ; the first joint of the posterior tarsi as long as the three following joints together. Dikoya. XENARTHRA UNICOLOR, sp. nov. (Plate XI. fig. 11.) Elongate, subdepressed ; testaceous ; the extreme apices of the tibiae fuscous; thorax square-shaped, impunctate; elytra scarcely visibly punctured, sparingly covered with long hairs. Length 4 lines. Head impunctate ; palpi robust. Antennae slightly shorter than the body, fuscous, the long appendages and the penultimate joint lighter, the latter thickened and elongate, as long as the following or terminal joint. Thorax scarcely broader than long, the sides nearly straight, slightly rounded before the middle ; the surface with two very shallow depressions, occupying the middle of the disk, clothed with a few long hairs, entirely impunctate. Elytra with some very fine punctures arranged somewhat longitudinally, clothed with long single hairs; the intermediate tibise slightly curved ; the first joint of the posterior tarsi as long as the three following joints together. Colombo. Of this species, which may be known by the larger size and the different structure of the terminal joints of the antennae, only a single specimen is before me. LUPERODES QUADRIPUSTULATUS, Motsch. Galle. This species varies in the colour of the elytral pattern from fulvous to black. Motschulsky's description agrees very well with the specimens before me, but the legs in all of them are fulvous, the extremities of the tibiae and the tarsi being fuscous only. Besides the six yellow spots of the elytra in plainly marked specimens, the apices of the same parts are also frequently yellow, in others the elytral margin is black or piceous, and the posterior yellow spot extends upwards at the sides, and unites with the one placed at the shoulder, thus reducing the yellow marks to a spot near tbe scutellum and a band at the sides, which increases greatly in width near the apex of each elytron. The antennse have the third joint about one half longer than the second, which is very short. If I have |
