OCR Text |
Show 1885.] PHYTOPHAGOUS COLEOPTERA OF JAPAN. 733 at the sides nearly confluent. Elytra convex, narrowed at the apices, deeply and regularly punctured, the interstices slightly costate at the sides and sparingly impressed with fine punctures ; posterior femora aeneous, the tibiae and the other legs fulvous. Hakodate. A single specimen. The comparatively large size of this insect, the rugosely punctured head without any raised tubercles, and the fulvous legs and antennae separate it from its many congeners. CHETOCNEMA AURIFRONS, sp. nov. Below blackish aeneous ; antennae black, the basal joint fulvous ; head cupreous, granulose-punctate; thorax and elytra violaceous blue, the former strongly punctured, the latter deeply punctate-striate. Var. Head and thorax aeneous, elytra light blue. Length 1| line. Head obscure cupreous, finely granulose and very closely punctured ; no frontal tubercles. Antenna? half the length of the body, the two lower joints fulvous, the rest black, third and fourth joints equal. Thorax twice as broad as long, widened at the middle, the sides straight, surface as closely but more strongly punctured than the head, the punctures semiconfluent at the sides. Elytra widened towards the middle, narrowed at the apices, very strongly and regularly punctate-striate, the interstices slightly convex at the sides ; femora greenish aeneous; tibiae fulvous, the anterior ones stained with greenish aeneous. Oguma. Three specimens. The colour of the head and that of the thorax and elytra separates this species from any of its congeners. In the variety, which is of smaller size, the entire thorax is of the same metallic aeneous colour as the head, and the elytra are bright blue, but structural differences I am not able to see. Genus HYPHASIS, Harold. H Y P H A S I S INCONSTANS, sp. nov. (Plate XLVI. fig. 1.) Fulvous or piceous ; the seven last joints of the antenna? black; thorax finely and remotely, elytra more distinctly and very closely punctured. Length |-1 line. Head with fine longitudinal striae at the vertex when seen under a strong lens, obsoletely depressed between the eyes; frontal tubercles strongly raised, rather elongate ; penultimate joint of the palpi thickened, the terminal one acute. Antenna? about half the length of the body, the four or five lower joints fulvous, the rest black, second joint much thicker than the third, but not longer. Thorax transverse, widened at the middle, the sides straight, oblique at the anterior angles, the disk covered with fine but not closely arranged punctures. Elytra with a narrow lateral margin, very closely punctured, the space near the suture slightly wrinkled, piceous or fulvous ; the thorax of a more reddish fulvous. Metatarsus P R O C . Z O O L . Soc-1885, No. XLVIII. 48 |