OCR Text |
Show 526 MR. F. P. PASCOE ON THE COLEOPTERA OF PENANG. [Nov. 22, genera as portions of one group (Callichrominar) as M. Thomson, without any knowledge of the species before us, has done. Again, looking to the genera connected with Euryarthrum (such as Homalo-melas and Prothema), and in a less degree with Dere, Obrida, and Ty-phocesis, we are led away to the Clytinar without being able to draw any satisfactory line between them. Such facts may serve to show the risk of our failing to recognize any affinity between two genera apparently widely different, but connected by intermediate forms (in many instances remaining to be discovered), and prepare us for the discrepancies which may occur in the views even of the same author. ASMEDIA MIMETES. (PL XLI. fig. 11.) A. atra; elytris albo bifasciatis; antennis apicem versus ochraceis. Deep black; head and prothorax finely and very closely punctured ; scutellum triangular; elytra very minutely punctured, two narrow white hairy bands dividing them into nearly three equal parts, the apex rounded ; body beneath dark steel-blue, with a short silvery white pubescence ; antennae gradually passing into ochraceous yellow from the fourth joint, the last five entirely ochraceous. Length 9 lines. CERAMBYCINiE. CERAMBYX. Cerambyx, Linne, Syst. Nat. ed. 12. i. s. 2. p. 621; Serville, Ann. Soc. Ent. de Fr. iii. p. 13. CERAMBYX PRUINOSUS. C. purpureo-fuscus ; elytris confertissime punctatis, pilis subtilis-simis dispersis, apicibus emarginatis, extus mucronatis; antennis pedibusque rufescentibus. Dark purplish brown, subnitid; head finely punctured, grooved between the antennae, the middle of the groove with a short strongly marked carina, below this a transversely impressed circular line; prothorax about equal in length and breadth, with a small prominent spine on each side, the disk with numerous short irregular corrugations; scutellum triangular; elytra minutely punctured, the punctures very close together between very delicate short transverse ridges, each mostly having at its base a short silvery hair (giving an appearance to the naked eye suggestive of the bloom on the plum), apices slightly emarginate, the outer angle with a short stout mucro ; body beneath dark chestnut-brown, minutely pubescent; legs yeL lowish-brown, the tibiae and tarsi paler, a dark ring at the extremity of the femora ; antennae not longer than the body ( § ?), pale reddish, darker at the base. Length 11 lines. The sole example in the collection appears to be a female, and is, I think, more suggestive of C. denticornis * of Fabricius than of any European species. * This and a few other species will, however, scarcely fit into any of the genera into which latterly even the restricted genus Cerambyx lias been divided. |