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Show 518 MR. F. P. PASCOE ON THE COLEOPTERA OF PENANG. [Nov. 22, Taken also by Mr. Wallace at Singapore and Sarawak. One of Mr. Lamb's specimens is an inch in length. CHLORIDOLUM CINNYRIS. C. angustatum, aureo-viride ; prothorace apice subtilissime trans-versim striato ; scutello obsolete punctato ; elytris vittis tribus cyaneo-viridibus ornatis; antennis pedibusque chalybeato-cyaneis. Narrow, golden-green ; head finely punctured, and slightly vertically striated between the eyes ; prothorax oblong, broader than the head, finely transversely striated, on the depressed apical portion the striae are nearly obsolete; scutellum triangular, scarcely punctured ; elytra covered with small crowded punctures, the suture and sides striped with bluish green; body beneath greenish golden-yellow ; legs glossy chalybeate blue, the posterior very long, the intermediate and anterior femora greenish ; antennae with the scape green, the remaining joints purplish blue deepening into blackish. Length 6 lines; posterior legs 10 lines. A more slender form than C. thomsoni, the apex of the prothorax very faintly striated, not more strongly than the rest as in C. thomsoni, and the scutellum so finely punctured that it might almost be said to be impunctate, while in C. thomsoni the punctures are coarser than those on the elytra. Chloridolum has been separated from Aromia (Callichroma) on account of its more slender antennae and legs. As in many other cases, this is only a question of degree ; but these characters, vague though they be, appear to mark a tolerably natural section of the old genus Callichroma. It is worth remarking that, taking Callichroma in its widest sense, Mr.Wallace found twenty-nine species scattered among the islands of the Malayan archipelago, including New Guinea, while only a single specimen (C. Cinderella, White) is known from Australia. In other respects the genus is cosmopolitan. There is also in the collection a single female of a species belonging apparently to M . Thomson's genus Leontium. PACHYTERIA. Pachyteria, Serville, Ann. Soc. Ent. deFrance, 1.11. p. 553 (1834). Nirarus, Newman, Charles worth's Mag. Nat. Hist. iv. p. 194 (1840). PACHYTERIA EQUESTRIS. Nirarus equestris, Newman, Entom. p. 79. Mr. Newman described this magnificent insect from a specimen, without a locality, in the then collection of this Society. It differs from the next species in its more transverse prothorax strongly angulated at the sides, the distinctly separated punctures, the rounded non-dehiscent elytra, and antennae with the five terminal joints black. In their bright and strongly contrasted colours they are otherwise almost alike. |