OCR Text |
Show 1892.] COLEOPTERA FROM KINA BALU. 85 TRIPLATOMA ATTENUATA. Triplatoma attenuata, Crotch, Cist. Ent. 1876, p. 405. Nesites attenuata, Bedel, Rev. Triplatoma, Ann. Mus. Civ. Gen. 1882, p. 10, t. x. f. 5. Kina Balu. Has occurred also at Sarawak and in Sumatra. Bedel's figure does not give a correct idea of the narrowness of the thorax in proportion to the width of the elytra. TRIPLATOMA GESTROI. Triplatoma gestroi, Bedel, /. c. p. 440, t. x. f. 4 ; Gorham, P. Z. S. 1883, p. 80, t. 18. f. 1. Labuan, Sarawak. Also occurs in Sumatra. ENCAUSTES MARGINALIS. Encaustes marginalis, Crotch, Cist. Ent. 1876, p. 477. Kina Balu. ASMONAX, genus novum. Characteres plerumque sicut in Encauste; dififert antennarum articulo tertio vix longiore quam secundus, prothoracis lateribus compressis, sinuatis, angulis anticis depressis, disco incequali, bicostato, elytris interstitiis alternis costato-elevatis. This new genus is nearly allied to Encaustes, but has a very different facies owing to the form of the thorax, and the costae on it and on the elytra. The front of the prosternum is plain as in Encaustes, that is to say, not elevated nor brought into a point in front as in Micrencaustes. ASMONAX WHITEHEADI, n. sp. (Plate IV. fig. 5.) Anthracinus, niger, nitidus; antennis articulis octo globuliformibus, tertio vix elongato, tribus ultimis transverso-compressis, pube-scentibus ; capite opaculo, fere Icevi, inter antennas transverse impresso ; prothorace transverso-subquadrato, ad angulos posti-cos parum angustato, Icevi, in medio nitidulo, obsolete haud acute bicostulato, ad margines subopaco, antice posticeque obsolete fossulato, punctis nonnullis hie illic dispersis, margine laterali tenuiter elevato ; elytris tenuiter punctato-striatis, costis tribus elevatis, quarta etiam externa cum suturali ad apicem conjuncta, seriebus duobus inter costas singulas. Abdomen fortiter sparse punctatum. Long. 18-19 millim. Hab. Borneo, Kina Balu and North Borneo (Whitehead). Wholly black and shining, subopaque in places, as the sides and lateral reflexed underside of the thorax. Owing to the form of the thorax, which has the sides sinuate, turned in and downward at the front angles, and the strong double ridge on the centre of the thorax, this species has a remarkable and Endomychidappearance; the costate elytra are an exaggeration of what takes place in such species as |