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Show 208 MR. M. JACOBY ON N E W [Feb. 17, very finely and closely punctured, except near the lateral margin, where stronger punctures are placed anteriorly, while a short but deep groove limits the posterior portion. The punctuation of the elytra consists of four stronger double rows of punctures; the interstices are everywhere closely, irregularly, and finely punctured. The antennae are entirely black; the third "joint is only one half longer than the preceding. It is possible that the Japanese specimen represents a closely allied but distinct form. CHRYSOMELA OBSCUROFASCIATA, sp. nov. (Plate XL fig. 11.) Oblong, convex, subcylindrical, dark violaceous blue or green above, below fuscous violaceous ; thorax closely punctured, the sides thickened, foveolate ; elytra closely and irregularly punctured, the interstices rugose, violaceous blue, the sides with a broad obscure purplish band. Length 5-6| lines. Head not very strongly punctured at the vertex and at the sides, the middle of the front nearly impunctate. Antennae slender, nearly half the length of the body, the six lower joints metallic blue, the rest black. Thorax transversely convex, the anterior margin slightly concave, posterior one broadly rounded, the sides slightly rounded in front, nearly straight at the base, the lateral margin much thickened through its entire length, deeply foveolate-punctate within, rest of the surface closely and more finely punctured. Scutellum impunctate. Elytra very convex and subcylindrical, scarcely widened behind; the entire disk covered with strongly impressed and closely placed punctures, which near the suture are generally divided by longitudinal smooth interspaces, the latter at the other parts of the surface being transversely rugose ; below the shoulders is a slightly depressed space, where the punctuation is much coarser, but towards the apex it becomes very fine and close; a single row of deep punctures accompanies the extreme lateral margin ; the space immediately in front of the latter is, however, generally smooth and impunctate. An obscure dark broad purplish band extends from the shoulder to the apex, narrowed at the latter place. Underside and legs more or less tinged with fulvous, otherwise violaceous blue. Prosternum deeply longitudinally sulcate. Niigata. More than 30 specimens of this fine and large species, obtained at one locality only, are before me. The colour of the upper side varies from green to blue and dark violaceous, the purplish band being sometimes very obscure ; the punctuation of the elytra varies also rather much, being in some specimens much more closely placed than in others, and in a single specimen the punctures are much deeper and larger, the inner disk near the suture being almost devoid of punctures ; in most instances, however, the punctuation is very close indeed and for the most part irregularly placed. The maxillary palpi have their apical joint broadly truncate and of very nearly the same length and width as the penultimate. |