OCR Text |
Show 1878.] MR. M. JACOBY ON PHYTOPHAGOUS COLEOPTERA. 151 ferruginous ; thorax of the same shape as that of D. gracilis, obliquely bifoveolate, green, impunctate; scutellum black; elytra a little widened behind the middle, distinctly longitudinally sulcate below the shoulder, surface closely punctured, green, an irregular blotch on the shoulders, a small elongate, triangular sutural mark near the base and below the scutellum, and a transverse narrow spot near the apex of each elytron, not touching the margin or the suture, black. Underside and legs exactly as in D. gracilis. Length 2\ lines. Hab. Ecuador. Two specimens, collected by Mr, Buckley, in m y collection. 18. DIABROTICA VARIOLOSA, sp. nov. Oblong, convex, widened behind, entirely dark green ; head and disk of thorax dark fuscous ; head impunctate, with a fovea in middle and a highly raised ridge between the antennae ; the latter with the second and third joints very short, the three basal joints light green, the following three flavous, and the rest ferruginous; thorax quadrate, rather convex, the disk with two foveae and an indistinct transverse fuscous mark; scutellum triangular, black ; elytra convex, much widened towards the apex, and coarsely and irregularly variolose and punctured, of a dark green colour. Underside pitchy black, femora green ; the breast on each side covered with a longitudinal patch of golden-yellow hair, and the abdominal segments margined with, long greenish hair, which also covers the legs. Length 3 lines. Hab. Ecuador. One specimen in m y collection. This species is allied to D. marginata of Sturm, but is devoid of the brownish margin round the elytra, and is distinguished by the colour of the underside and legs as well as of the antennae. 19. DIABROTICA PERUANA, sp. nov. Elongate, convex, much widened behind, black beneath ; thorax flavous; elytra flavous, with the base and a large spot near the apex bluish black ; head impunctate, with two distinct tubercles in front of the usual middle fovea; antennae long, filiform, entirely black; thorax subquadrate, impunctate on the disk, with two foveae near the sides light flavous ; scutellum black; elytra of the same colour as the thorax or a little lighter, with a broad band at the base, not touching the lateral margins, and a large subquadrate spot behind the middle bluish black ; the punctuation on the disk very distinct and even coarse towards the base. The entire underside with the legs and tarsi black, finely covered with yellowish hair. Length 3| lines. Hab. Peru. 20. DIABROTICA SEXPLAGIATA, sp. nov. Elongate, parallel; head and thorax testaceous, the latter with a |