Mr. II. W. Bates on the Cokoptcra of the Amazon Valley, 117 tractis, folio brevioribus; clrupa oblonga, 1-spcrma. — In syl-vis prov. Rio de Janeiro. I have not seen this plant, which evidently is very closely allied to, if not identical with, one of the three last-named spe-cies. The size of the leaves is not given by DeCandolle, nor the characters of the flower; but its fruit and seed are completely those of V. mucronata. The calyx is said to be 5-partite, with puberulous ovate sepals; the drupe oblong and 1-sceded, the seed being plicated round the prominent longitudinal indurated placenta, which is enlarged by other two abortive cells, and projects far into the cavity of the fertile cell, the seed being suspended from its summit. The specimen, being fructiferous, appears to have had no flowers, as Prof. DeCandolle says of it, " flore ignoto." XIV. — Contributions to an Insect Fauna of the Amazon Valley t CoLEOPTERA : LoNGicoRNES. By H. W. Bates, Esq. [Continued from vol. viii. p. 478.] Genus iExHOMERUs. Thomson, Class, des Ceramb. p. 338. Syn. Macronemus, Dej. Cat. j White, Cat. Char, emend. Body subcylindrical. Muzzle moderately broad, quadrate; front plane; antenniferous tubercles short, prominent, widely separated at their bases. Antennrc naked, excessively elongated, in some species being five or six times the length of the body, capilliform ; the joints dightly increasing in length to the apex, the eleventh joint generally the longest; the basal joint short, very slender at the base, abruptly enlarged into an ovate club. Palpi normal. Prothorax unituberculated on the sides. Elytra rounded at the tip. Femora clavate ; tarsal joints short. Presternum greatly constricted between the large anterior coxte. The sexes are not distinguishable, as in Longicornes gene-rally, by the relative length of the terminal antcnnal joint in most of the species ; there is a sexual character, however, in the apical ventral segment, the ? having in that part a deeply im-pressed fovea. The genus was established on certain curious species which agreed in having greatly elongated and hair-like antenna;, and strongly bowed fore tibiae. 1 have extended the definition so as to embrace the AJphus Lacordairei of Dejean's catalogue — an insect which differs from all oihex Alphi, including A. tubcrosus of Gcrmar, to which it has otherwise some rcsem-blauce, in the curiously abrupt dilatation of the first autennal
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