1892.] COLEOPTERA FROM KINA BALU. 85 



TrIPLATOMA ATTENtJATA. 



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, I. c. p. 440, t. x. f. 4 ; Gorham, P. Z. S. 



1883, p. 80, t. 18. f. 1. 

 Lahuan, Sarawak. 

 Also occurs in Sumatra. 



Encaustes marginalis. 



Encaustes marginalis, Crotch, Cist. Ent. 1876, p. 477. 



Kina Balu. 



AsMONAX, genus novum. 



Oharacteres plerumque sicut in Encauste; differt antennarum 



articulo tertio vix longiore quam secundus, prothoracis lateribus 



compressis, sinuatis, angulis anticis depressis, disco incequali, 



bicostato, elytris interstitiis alternis eostato-elevatis. 



This new genus is nearly allied to Encaustes, but has a very 



different facies owing to the form of the thorax, and the costse on it 



and on the elytra. The front of the presternum is plain as in 



Encaustes, that is to say, not elevated nor brought into a point in 



front as in Micr encaustes. 



AsMONAx WHiTEHEADi, u. 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 re'flexed 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 Endoraychid appearance ; the costate 



elytra are an exaggeration of what takes place in such species as 



