Classification of the Coleopterous family Dynastidx. 327 



$. The protborax is impressed in front and there is a median 

 tubercle just behind the front margin. The front tarsi are thickened 

 and the inner claw very broad. 



The type species is tbe following : — 



Pscudoliomonyx hornecnsis, sp. ii. 



Niger, nitidus, elongatus, subtus rufo-hirtus, capite rugoso, medio 

 leviter transversim impresso ; prothorace minutissime puuctato, 

 parum convexo, basi utrinque leviter impresso ; scutello minutissime 

 punctate ; elytris fortiter striatis, striis crebre annulato-punctatis, 

 interstitiis dorsalibus convexis, hand perspicue punctatis, lateribus 

 atque apicibus grosse ac crebre punctatis ; propygidio subtiliter 

 pygidioque fortiter et confluenter punctatis : 



$, prothorace antice leviter longitudinaliter impresso, margine 

 medio vix tuberculato. 



Long. 19-23 mm. 



Hah. Borneo : Sarawak ; Labuan. 



This was taken by Dr. A. R. Wallace in Sarawak and 

 by Mr. Hugh Low in Labuan. In size, shape and sculp- 

 ture it closely resembles Pscvdohomonyx morator, F. (of 

 which I believe Heteronychus j'avanus, Burm., to be a 

 synonym), but it differs in tbe very close and strong 

 puncturation of the sides and apices of the elytra and the 

 pygidium and in the less broad and deep anterior impres- 

 sion of the protborax and feebler marginal tubercle in the 

 male. 



There are two other species in our collection from the 

 same region, but as both are represented by single speci- 

 mens only I prefer for the present to leave them 

 undescribed. 



The process of elimination has thus reduced the number 

 of Oriental forms properly referred to Heteronychus to four, 

 viz. H. 'poro2)ygus, Bates, annulatus, Bates, curtulus, Fairm. 

 and punctolineatus, Fairm. ; and to these must be added 

 " Phikurus " sibbhxvis, Fairm., of which M. Lesne has kindly 

 examined the type for me. 



The species is a common and widely distributed one, 

 but Fairmaire's description, in the statement that there 

 are no stridulating organs and in other particulars, is so 

 misleading th^t I h^ve redescpbed it here, 



