332 Mr. G. J. Arrow on a Contribution to the 



morio, of Falderman, to Heteronychvs, the former being the 

 insect which he has redescribed as Trionyclms Poteli, while 

 his Trionyclmis assamcnsis is Phileurvs planatus, Wiede. 

 Fairmaire has described the males of these, while the 

 older writers have in each case described the females. 

 Trionychus, or more correctly Bhizoplatys, is properly an 

 African genus and, with these Oriental PMleuri, forms a 

 link between the true Phileurus (which is confined to 

 America) and the Pentodontides. The Oriental species 

 form a well-defined genus, for which another new name 

 must be found. 



EOPHILEURUS, n. gen. 



Elongate and ratlier depressed. Head olstusely pointed in front, 

 with a single median horn or tubercle. Mandibles produced in front, 

 not notched or toothed. Maxillae 3-toothed. Labium broad, with the 

 paljii inserted at the inner side. Front tibioo acutely 3-dentate, with- 

 out secondary denticulation. Hind tibise truncate, strongly spinose. 

 Tarsi slender, with the basal joint in the middle and hind legs pro- 

 duced at the outer edge. The prothorax is generally more or less 

 excavated, at least in the male. The male has the front tarsi 

 thickened and its inner claw broad and cleft; and the head bears a 

 slender, though not long, horn. 



The species belonging to this genus are : — Phileuoms 

 planatus, Wiede. ( = assame')isis, Fairm.), chinensis, Fald. 

 (^ = Potdi, Fairm.), 'platyptems, Wiede., morio, Fald. con- 

 vexuSy Arrow, and the following undescribed forms: — 



Eopliilcurus perforatus, sp. n. 



Niger, nitidus, parallelus, baud longus, supra grosse, parum dense 

 jjunctatus ; prothorace antice sat crebre, postice laxe punctato, disco 

 leviter longitudinaliter impresso, lateribus valde curvatis ; scutello 

 laevi ; elytris seriato-punctatis, punctis annulatis, distinctis, interstitiis 

 minutissime punctulatis ; pygidio sat grosse, lateribus rugose, 

 punctato : 



(J, capite lajvi, polito, cornu sat brevi, gracili, curvato, protho- 

 race ad marginem anteriorem late sat leviter impresso : 



5 , capite rugose punctato, medio tuberculato, prothorace rcquali. 



Long. 19-22 mm. Lat. max. 9-10 mm. 



Eah. Southern India : Bombay, Mhow, Belgaum. 

 Our collection contains a series of male examples and a 



