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Show 316 MR. M. JAC0BY ON T H E [Mar. 7, Head broad, sparingly and finely punctured at the vertex, the frontal tubercles and the carina broad and short; antennas extending to the middle of the elytra, black, the basal joint thickened, the second and third very short, equal, the following joints subquad-rately widened, apical joint pointed ; thorax nearly twice as broad as long, the sides rounded, the anterior angles thickened, the posterior onesobsoletely rounded, the posterior margin distinctly so, the surface not very closely but rather strongly punctured ; scutellum broader than long; elytra very closely and evenly punctured, the punctures of the same size as those of the thorax, the interstices slightly Avrinkled ; underside and legs black. Hab. Natal, obtained by sweeping (G. Marshall). DEC ARIA ABDOMINALIS, sp. U. Black, shining, abdomen flavous, the antennas ten-jointed; thorax impunctate, elytra extremely finely punctured. Yar. Underside entirely black. Length 4 inillim. Subelongate, black, very shining, the head impunctate, the frontal tubercles obsolete, transverse, clypeus with a strongly raised central ridge; antennas short, ten-jointed, black, the fourth and the folloAAing joints transversely widened, not longer than broad, the terminal joint more elongate, second one very short; thorax transversely subquadrate, about one-half broader than long, the sides deflexed, the lateral margins nearly straight, the angles obtuse, the surface impunctate or with a few minute punctures ; scutellum small; elytra much wider at the base than the thorax, parallel, subcylindrical, extremely minutely and not very closely punctured, black and shining, their epipleuras continued below the middle ; all the tibias mucronate, the posterior femora much thickened, the first tarsal joint as long as the following two joints together, claws appendiculate ; abdomen flavous ; presternum very narrow; the anterior coxal cavities open. Hab. Estcourt, Natal, on acacia-trees (G. Marshall). I must refer this insect to Weise's genus Decaria, the only one, with the exception of Psylliodes, in which the antennas have ten joints only. Weise speaks only of the posterior tibias having a spine, in the species before me all the tibias are mucronate: the author has neither mentioned the length of the posterior metatarsus nor the shape of the prosternum, but the other characters agree with his description ; in three specimens the abdomen is flavous, in a single one the entire underside is black, but no other differences can be seen. MALVERNIA, gen. n. Oblong; the antennas filiform, long, the 8th, 9th, and 10th joints moniliform, the terminal joint elongate, strongly thickened, AAith an additional appendage at the apex ; thorax transverse, without sulcus; elytra irregularly punctured, epipleuras broad at the base, indistinct below the middle; legs rather robust, the |