Insects. 8651 



lateribus rotundatis, angulis posticis productis, acutioribus, an- 

 gulis anticis obtusis, marginibus anticis et posticis fere rectis ; 

 glabrum, nitidum, punctis sat profundis, segregatis impressum, 

 foveisque duabus ovalibus, planitie glabra interposita, pone 

 medium ; rufo-castaneum, marSinibus dilutioribus. 



Scutellum modicum, punctatum. 



Elytra pronoto latiora, ac fere duplo longiora, punctis valde pro- 

 fundis, confluentibus rugose irapressa, distincte striata, striis ad 

 margines laterales atque apices evanescentibus. 



Abdomen latum, depressum, alte marginatum, angulis segmentorum 

 productis, glabrum nitidum, supra laevissime sed distincte punc- 

 tatum. 



Antennae breves, robustae, capite paullo longiores, ad apicem grada- 

 tim incrassatae, articulis 6 — 10 transversis, apicali magno acu- 

 minato. 



Pedes robusti, simul cum palpis atque antennis laete run*. 



Differt ab O. Salicis, cui proximum est, antennis brevissimis, pro- 

 noto minore, ac punctura tota dissimillima. 



Head pitchy black, distinctly and very remotely punctured, with 

 an elevated smooth space between the antennae, behind which is a 

 deep, rugose, transverse fovea, somewhat curved towards the middle ; 

 forehead prominent, with a small fovea in front of the ocelli. Eyes 

 large and very prominent. 



Thorax rather wider than its length, wider than the head and some- 

 what longer, with the sides rounded, and the posterior angles pro- 

 duced and acute, the anterior angles obtuse, the posterior and anterior 

 margins nearly straight ; smooth and shining, distinctly and remotely 

 punctured, with two slight oval depressions behind the middle, and a 

 glabrous space between them ; rufo-castaneous, with the margins pale. 



Scutellum moderate, punctured. 



Elytra about twice as long as the thorax and wider, rugosely and 

 confusedly punctured, distinctly striate, with the striae evanescent 

 towards the sides and apex. 



Abdomen broad, depressed, strongly margined, with the angles of 

 the segments produced ; smooth and shining, clearly and very finely 

 punctured. 



Antennae short and stout, scarcely longer than the head, gradually 

 incrassated towards the apex, with the 6 — 10 joints inclusive trans- 

 verse, and the apical joint large, acuminate. 



Legs robust. Antennae, legs and palpi bright orange-red. 



