JOURNAL pptD ]9oFk Clntoraologiral Horiptg* Vol. XII. DECEMBER, 1904. No. 4 Class I, HEXAPODA. Order II, COLEOPTERA. NEW GENERA AND SPECIES OF COLEOPTERA. By Charles Schaeffer, Brooklyn, N. Y. The following descriptions and notes are published in advance of a list of the Coleoptera known to occur in the lower Rio Grande Valley on which I have been at work ; but have postponed its publication on account of the possible addition I may secure on my second trip to this interesting region. A few notes and descriptions of beetles from other regions are added. Calosoma dietzii, new species. Form of discolor, deep black, the reflexed elytral margin, base and sides of pro-thorax with a bluish reflection. Head sparsely punctate and very feebly rugose, ej'is-tomal impressions deep, causing a slight convexity of the front ; labrum angularly emarginate, rugose and impressed; mandibles stout, faintly rugose; antennse nearly as long as the head and thorax, the outer joints at sides glabrous at base. Prothorax not quite twice as wide as long, widest before the middle, sides arcuate anteriorly, becoming nearly straight posteriorly, hind angles broadly arcuate and produced pos-teriorly, base slightly arcuate-truncate, apex broadly emarginate, with a broad, flattened, impunctured bead ; disk moderately convex, basal angles feebly impressed and slightly reflexed, surface very feebly rugose, finely and sparsely punctate, the punctures larger at sides, coarser and more confluent in the basal region, median line fine. Elytra oval, not quite one half longer than wide, very little wider than the thorax in its widest part, sides slightly arcuate, margin evenly and narrowly reflexed and coarsely rugosely punctate with a few granules intermixed ; disk convex, stria composed of fine, feebly impressed punctures, punctuation of intervals finer and sparser; surface smooth. Length, 15-18 mm. ; width, 7-8.5 mm. 197
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