OCR Text |
Show 1877.] MR. M . J A C O B Y O N N E W C O L E O P T E R A . 515 a distinct, short, longitudinal middle groove, strongly punctate, longitudinally rugose near the eyes, violet-blue ; epistome wedge-shaped, separated from the front, with the anterior margin emarginate, strongly punctured, and covered with short whitish pubescence; labrum, mandibulse, and the last joints of the palpi black, the first two joints testaceous, antennse with the seventh joint the longest, the first much thickened and nearly globular, the second less than half the length of the third, the last joints elongate and almost cylindrical ; the first five joints are of a greenish black colour and shining, while the rest is very light flavous and strongly covered with whitish hair ; thorax with the sides obliquely deflexed in front and converging from the base to the apex, with the anterior angles produced into a short tooth, and the extreme lateral margins slightly waved, posterior margin transversely grooved through its entire length, above subcylindrical, covered with crowded large punctures near the base, more finely near the apex, shining greenish violet; scutellum with the apex broadly rounded, scarcely longer than broad, impunctate ; elytra broader than the thorax, parallel, slightly narrower towards their apex, extremely closely and transversely rugose, strongly punctured near the base, and longitudinally costate near the extreme apex and the suture at its extremity, of a uniform violet-blue, with a greenish reflection; underside obscure metallic blue finely punctate ; legs of the same colour, tarsi light brownish, covered with yellowish pubescence. Length 4 lines. Hab. Borneo. Collection Jacoby. CHRYSOMELI DM. Genus DORYPHORA, Illig. 10. DORYPHORA BICOLOR, sp. nov. Ovate, convex, piceous above, shining; head black, opaque, very remotely and finely punctate, labrum fulvous; antennse black, with the first two joints beneath testaceous; thorax black, moderately convex, the lateral margins parallel at the base till about the middle, from there moderately rounded to the apex, the anterior angles not much produced, surface distinctly and not closely punctate, the punctuation much stronger than the head, but not stronger near the sides than on the disk ; scutellum triangular, impunctate. Elytra a little wider at the base than the thorax, regularly rounded towards the apex, punctate-striate, the strise arranged in double rows, which are now and then, especially towards the sides, a little irregular, of a dark piceous colour; a narrow flavous band extends from across the base of each elytron along the lateral margins (leaving, however, a small border of the ground-colour) to the apex, aud, after running upwards close to the suture to the middle of the elytra, is connected by another transverse band of the same size and colour with the lateral one. Body beneath and legs shining black, the mesosternal process rather long and slightly curved. |