310 Mr. H. W. Bates on CorainJnjciJw 



Genus Dodecosis, 



Bates, Entom. Monthly Mag. iv. 27 (1867); Lacord. 

 Gen. viii. 398. 



(Charac. emend.) . Corpus subcylindricum. Caput 

 antice verticale, breve, tuberibus antenniferis elevatis, 

 supra acutis ; palpi brevissimi^ apice truncati, vix securi- 

 formes ; antennas corpore duplo longiores, filiformes, 

 robustaj, distincte 12-articulatje, longe pilosaB, articulo 

 Imo brevi claviformi_, 3io paulo 4to breviori, a 4to ad 

 12mum aequalibus, simplicibus. Thorax cylindricus, elytris 

 multo angustior, inermis, antice et postice transversim 

 impressus. Elytra linearia, apice breviter truncata. 

 Pedes modice graciles, femoribus paulo incrassatis. Pro- 

 sternum inter coxas angustum ; coxis exserto-conicis, 

 extus angulatis ; acetabula intermedia extus aperta. 



This genus seems not to fit into any of the sub-families 

 or "groupes" into which Lacordaire has divided the 

 Ceramhyeidce. In its completely 12-jointed and exces- 

 sively short antennae, and perpendicular forehead, it 

 is unlike any other genus known to me. In facies, 

 however, it resembles somewhat the Obriince, and it 

 seems less out of place in this sub-family than in any 

 other. 



1. Dodecosis saperdina. Bates, I. c. 



Fulvo-testacea, sub-opaca, longe tenuiter pilosa ; an- 

 tennis (articulo prime excepto) fusco-nigris, articulis basi 

 pallidis ; fronte convexa ; thorace lateribus antice breviter 

 tuberculato, disco paulo elevate ; elytris dense punctula- 

 tis, sutura margine laterali cariuaque dorsali ante apicem 

 desinente elevatis. 



Long. 34 lin. $ . 



Hah. — River Tapajos. 



One example only. 



The insect resembles, in its general shape, and to some 

 extent in the filiform antennae, certain slender species of 

 Sapeirlhice. 



