6 Mr. W. S. Dallas's Descriptions of some III. Descriptions of some new Species of Hemipterous In-sects belonging to the Tribe Scutata. By W. S. Dallas, Esq., F.L.S. [Read 2nd February, 1852.] My principal object in the present paper is to publish descriptions of various species of Hemiptera, belonging to some of the smaller genera proposed or adopted by me in the first part of the Catalogue of Hemipterous Insects contained in the Collection of the British Museum. Most of these insects are in my own collection ; for two of them I am indebted to the kindness of Mr. West wood, and one is unique in the collection of this Society, Family ASOPID^. Genus Oplomus, Spin. Oplomus elongatus, n. s. (PI. I. fig, 1.) O. elongatus, ca?ruleus, virescenti-nitens, punctatus; elytrorum corio opaco ; abdominis maculis 3 spinaque basali, femori-bus omnibus tibiisque posticis et intermediis fulvis; geniruh's, tibiis anticis totis, alterisque apice, tarsis, antennis rostroque nigris. $. Long. lin. 5| (m. 0.012). Hab. in Brasilia? In Mr. Westwood's collection. Very elongate, deep blue, shining, tinged with green. Head, above, rather thickly punctured, but with two smooth longitudinal bands on the vertex between the ocelli ; beneath thickly and finely pi nctured. Eyes brown; ocelli yellow. Antennae black, clothed with a pale pubescence ; basal joint tinged with blue. Rostrum pitchy black, becoming pitchy towards the apex. Pronotum with the lateral margins waved, the lateral angles very slightly promi-nent; the surface convex, rather thickly and finely punctured, with a narrow smooth line down the centre. Scutellum rather sj)aringly and finely punctured at the base; the apical portion with a smooth, impunctate, raised line down the middle, on each side of which the surface is very thickly and finely punctured ; the lateral mar-gins thickly and finely punctured, leaving a nnrrow impunctate space on each side between tiie margin and the band of punctures which accompanies the central raised line. Breast thickly and finely punctured, with a smooth space on each side of the medipectus ;
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