1892.] coleoptera from kina balu. 85 



Triplatoma attenuata. 



Tri2Jlatoma 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 gestrdi, Bedel, /. 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. 



Eina Balu. 



Asmonax, genus novum. 



Characteres plerumque sicut in Encauste ; differt antennarum 



articulo tertio vis longiore quam sevundus, prothoracis lateribus 



compressis, sinuatis, angulis anticis depressis, disco incequali, 



bicosfato, 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 costse 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 globidiformibus, 



tertio vix elongato, tribus ultimis transverso-cotnpressis, 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 castas 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 Endomychid appearance ; the costate 



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



