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Show 1877.] FROM DUKE-OF-YORK ISLAND. 153 far from New Ireland, and from Lifu, is said by Reiche to be with P. bimaculata (Guerin) from Penang. If I have rightly determined the species, it is distinct, being much less coarsely punctured, especially on the thorax. ORYCTODERUS CORONATUS, n. sp. (Plate XXIV. fig. 5.) Oblongus, modice convexus, niger nitidus, capite subcrebre punctulato, thorace sparsissime punctato, transversim quadrato, angulis posticis late rotundatis; elytris thorace haud latioribus, stria suturali excepta omnino lavibus; sternis castaneo-rufis, rufo-hirtis. 8 • Clypeo utrinque fortiter bisinuato (haud inciso), margine antico recto, paulo refiexo; fronte media unituberculata; tarsis anticis ut in O. latitarsi incrassatis. Long. 18 lin. Closely allied to Oryctoderus latitarsis, and differing solely in the form of the margins of the clypeus, and the presence of a tubercle in the middle of the forehead. A species (still undescribed) was taken by Wallace in the island of Goram, which presents also the character of a tuberculated forehead ; and I should have been inclined to regard both as varieties of O. latitarsis, if this latter species did not show itself so constant in its specific characters. The Goram species, besides being much smaller, differs in the nearly entire lateral margins of the clypeus. There is only one example in the collection, unless a female individual, 11 lines long, be a small specimen of the other sex. DIPELICUS NASUTUS, n. sp. (Plate XXIV. fig. 4.) Oblongus, convexus, crassus, supra castaneo-niger nitidus, subtus castaneo-rufus, rufo-hirtus; capite leevi, clypeo antice obtuse bidentato laminaque ascendente semiovata, apice late emarginata ; thorace sparsim subtiliter punctulato, haud excavato, sed sulco dorsali antice Icevi haud profundo ; elytris striato-punctatis striaque suturali magis impressa. Long. 8 18 lin. Allied to D. cantori, but distinguished at once by the vertical expansion of the clypeus being notched at the tip instead of entire and triangular. The singular dilatation of the terminal joint of the labial palpi, distinctive of this genus, is well developed, as is also the truncation of the dilated apices of the posterior tibiae and the long dilatation of the upper edge of the basal joint of the hind tarsi. One example only. SCAPANES AUSTRALIS, Boisd., ' Voyage de l'Astrolabe,' Coleop. p. 158, tab. 9. f. 4. One pair; more robust and with more coarsely punctured elytra than New-Guinea specimens taken by Wallace. The thoracic horns are parallel, instead of convergent towards the tips. If these differences prove constant when a laige number of specimens are obtained, they may prove the present form to be a distinct species. |