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



morio, of Faldcrman, to Hcteronyehvs, tlio former being the 

 insect which he has redescribed as Tinonychns Poteli, while 

 his Trionychus assamcnsis is Phihvo'iis 'plnnatus, Wiede. 

 Fairmaire has described the males of these, while the 

 older writers have in each case described the females, 

 Trionychnu, or more correctly Wiizop/atys, is properly an 

 African genus and, with these Oriental Fhikuri, forms a 

 link betAveen the true Phileurus (which is confined to 

 America) and the Pentodontides. The Oriental species 

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

 must be found. 



EoPHiLEURUS, n, gen. 

 Elonp^ate and ratlier depressed. Head obtusely pcnnted in front, 

 with a sinf;le median horn or tubercle. Mandibles produced in front, 

 not notched or toothed. Maxill.io 3-toothed. Labium broad, witli the 

 palpi inserted at the inner side. Front tibifc acutely 3-dentate, with- 

 out secondary denticulation. Hind tibiae 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 tiirsi 

 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 : — Phileurus 

 planat'us, Wiede, { = assa mends, Fairm.), cJiincnsis, Fald, 

 ( = Poteli, Fairm.), platypterifs, Wiede., morio, Fald. con- 

 vcxus, Arrow, and the following undescribed forms: — 



Eophile^triis ]Jcrforatus, sp. n. 



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

 punctatus ; prothorace antice sat crebre, jiostice laxe punctato, disco 

 leviter longitudinaliter impresso, lateribus valde curvatis ; scutello 

 lasvi ; elytris seriato-punctatis, i)unctis annulatis, distinctis, interstitiis 

 minutissime punctulatis ; pygidio sat grosse, lateribus rugose, 

 punctato : 



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

 race ad marginem anteriorem late sat leviter impresso : 



9, capite rugose punctato, medio tuberculato, prothorace a^(juali. 



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



Hal). Southern India : Bombay, Mhow, Belgaum. 

 Our collection contains a series of male examples and a 



