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Show 602 MR. H. w. BATES ON N E W [May 21, TACHYS DIPLOHARPINUS. Oblongus, modice convexus, sericeo-nitens, subopalescens; partibus oris, antennis pedibusque fulvis; mandibulis acute hamatis,- oculis prominulis; foveis frontcdibus fortiter impressis, post oculos cur-vatis; thorace lato, postice modice sinuato-angustato, angulis posticis exstantibus acutis, margine laterali elevato-explanato; elytris letvibus, stria suturali solum fortiter impresso, striola apicali recurva fortiter impressa, apice setifero, foveis irregularibus duabus submarginalibus, puncto discoidali mediano. Long. 1^ lin. Hab. Chontales, Nicaragua (Janson). A species remarkable for its many points of resemblance to the genus Diploharpus. BEMBIDIUM (NOTAPHUS) FLOHRI. Oblongum, parallelogrammicum, deprcssum, ceneum nitidum, elytris pallido-testaceis, regione scutellari, gutta utrinque discoidali, maculaque majore postmediana transversa fuscis; palpis, antennis et pedibus fulvo-testaceis ; sulcis front alibus modice impressis sim-plicibus; capite Icevi; thorace postice angustato, angulis posticis obtusis fere rotundatis, supra medio basi strigoso, fovea utrinque vaga, lata, rugulosa, carinaque acuta oblique ad angulum posticum ducta ; elytris thorace vix latioribus, integriter punctulato-striatis, interstitiis planis, tertio tripunctato. Long. 2 - 2 | lin. Hab. Mexico, near the capital (Flohr). The species belongs to an unnamed group near Notaphus, and is only referred to the latter for general guidance as to its position. BEMBIDIUM (NOTAPHUS) PLACITUM. Elongato-oblongum, depressum, viridi- vel subcupreo-ceneum, elytris cupreo-fuscis ( 3 nitidis, 2 subopacis) vitta laterali ab humero usque medium, intus biloba, fasciaque maculari ante apicem, fulvo-testaceis ; sulcis frontalibus latis haud profundis; thorace late rotundato, postice magis quam antice angustato, angulis posticis obtusis, fovea media profunda carinaque parva juxta angulum ; elytris subtiliter punctato-striatis, interstitiis planissimis, tertio 3 - punctato ; paljris, antennis pedibuscpie obscure piceis. Long. 3 lin. Hab. Mexico, near the capital (Flohr). This species has been mistaken for N. semifasciatus of Say. His description, however, suits much better an equally common and similar, but smaller, Mexican species. BEMBIDIUM (PERYPHUS) ROGERSI. Gracile, convexiusculum, nigro-ceneum, pedibus piceis, antennarum articulo basali subtus rufo,- thorace anguste cordato, antice rotundato, postice sinuatim angustato, angulis posticis rectis, basi transversim depresso, vage punctato, foveis profundis carinaque elevata ad marginem fere parallela; elytris punctulato-striatis, |