38 



PLATYPHYMATIA. 



S. squalidus, Macl. Among some specimens sent to me by 

 Mr. Cowley which agree very well with Sir W. Macleay's 

 description of this insect, and which were taken in the same 

 locality as the type, I find a single example, which I take to be 

 the female. It agrees with the male in all respects of sculpture, 

 &c, except in the anterior elevation of its prothorax being much 

 less strong, its pygidium notably less gibbose, and its hind 

 femora unarmed. 



OCNODUS. 



0. lepidus, sp. nov. Ferrugineus, clypeo picescenti, antennarum 



clava dilution ; nitidus ; fortiter punctulatus, elytrorum 



puncturis quam cetera? manifeste majoribus ; clypeo antice 



subrotundato ; prothorace quam longiori duplo latiori, antice 



parum angustato, angulis anticis productis minus acutis 



posticis obtusis, lateribus leviter rotundatis, basi vix lobata ; 



elytris obsolete tricostatis, baud setosis ; tibiis anticis extus 



tridentatis. Long., 4^ 1.; lat., 2^ 1. 



Differs from 0. spinicollis, Blackb., and fallax, Blackb., inter 



alia by the obtuse hind angles of its prothorax, from 0. decipiens, 



Burm., and ferrugineus, Blackb., by the absence of seta? on the 



upper surface, and from lugubris, Blackb., by the very much less 



close puncturation of its pronotum. The upper margin of the 



labrum is distant from that of the clypeus (as in 0. fallax). 



The sculpture of the upper surface is in all parts very similar 



to that of 0. fallax. It should be noted in respect of this 



insect (as I have pointed out in describing other species that I 



have attributed to Ocnodus) that it is possible it is not really 



congeneric with 0. decipiens, Burm., a species that I have never 



been able to identify. 



S. Australia ; basin of Lake Eyre (taken by Herr Koch). 



HETERONYX. 



H. unicus, sp. nov. Sat brevis ; sat latus ; modice convexus ; 

 nitidus ; subglaber, lateribus corpore subtus pedibusque 

 sparsimpilosis ; pallide brunneo-testaceus ; capite confertim 

 rugulose, prothorace sparsius sat fortiter, elytris inaequaliter 

 (i.e., puncturis sat grossis et aliis minoribus inrequaliter 

 intermixtis), pygidio vix manifeste, punctulatis ; clypeo 

 fortiter reflexo antice late rotundato, sutura clypeali minus 

 distincta ; prothorace quam longiori fere duplo latiori, antice 

 minus angustato, lateribus sat rotundatis pone medium vix 

 subsinuatis, basi media late leviter lobata, angulis anticis 

 parum productis posticis obtusis ; elytris costis sat obsoletis 

 circiter 4 instructis, his quam interspatia magis sparsim 

 punctulatis ; tibiis anticis extus 3-dentatis ; labro clypeum 



