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Show 188 MR. MARTIN JACOBY ON NEW SPECIES [Mar. 4 Hab. Venezuela. This species closely resembles in coloration and pattern many others of the genus, but may be distinguished by the impunctate elytra, the width of their black stripes, the comparatively narrow and unspotted thorax, and the rather large general size of the insect. DlSONYCHA BREVICOLLIS, sp. n. Oblong, pale testaceous, the antennae (the basal joints excepted) and the tarsi black; thorax short and transverse, scarcely punctured ; elytra closely and distinctly punctured, the sutural and lateral margins and a narrow obsolete discoidal stripe obscure pale fulvous. Length 6 millim. Head with a few punctures placed transversely between the eyes, the frontal elevations feebly raised ; clypeus broad, testaceous, like the labrum and the rest of the head; eyes rather elongate; antennae robust, black, the basal three joints flavous ; thorax more than twice as broad as long, the sides nearly straight, the anterior angles produced obliquely outwards, the posterior angles oblique but not produced, the basal margin rounded, the disc with a few fine punctures; elytra closely and comparatively strongly punctured, the sutural and discoidal stripes very narrow and obsolete, the lateral margins more broadly marked with pale fulvous ; below testaceous, the tarsi black. Hab. Ventanas, Mexico. This species, which was unknown to m e during the publication of the Mexican Phytophaga in the ' Biologia Centr.-Amer.,' is readily distinguished by the shortness of the thorax, the more than usual strong elytral punctuation, and the narrowness and faint coloration of their stripes. Two specimens are in m y collection. DlSONYCHA ANGULATO-FASCIATA, Sp. n. (Plate XX. fig. 4.) Flavous, the head with two, the thorax with five black spots ; elytra impunctate, black, a transverse medially constricted band at the base, another at the middle, and a spot near the apex flavous; the apex of the femora and the tibiae and tarsi black. Length 4 millim. Head with some deep punctures near the eyes, flavous, a spot on the vertex and another small spot between the eyes black, the latter rather large; carina strongly raised; antennae robust, black, the lower four joints flavous, the basal two stained with black above, third and fourth joints equal; thorax twice as broad as long, the sides straight, very narrowly margined, the anterior angles oblique, the disc impunctate, flavous, with five small black spots (2, 3) placed transversely, the outer ones of the second row the largest, the base with an obsolete transverse sulcus ; scutellum black ; elytra not perceptibly punctured, with alternate transverse flavous and black bands of angulate shape, the sutural and lateral |
