Genus Ccntrimis and its Allies. 327 



prothorax, cordiform, rather slightly convex, deflexed at the 

 sides, narrowly striate, interspaces broad, flattish, crossed by 

 minute, waved, raised lines, between them whitish piliform 

 scales ; body beneath black, shining ; mesosternum, epimera, 

 and sides of the abdomen covered with yellowish-red piliform 

 scales ; fore legs much longer than the others, their tarsi 

 dilated and fringed with long blackish hairs. 



Type of Optatus. Pectoral canal distinct ; anterior coxas 

 contiguous ; mesosternum raised, nearly vertical in front ; 

 first abdominal suture distinct j scrobes oblique, the posterior 

 half passing beneath the rostrum, but not united to its fellow ; 

 femora toothed j claws free, but approximate. 



Centrinus cupreus. 



C. rhombicus, nitide cupreus, glaber, prothorace modice convexo, 

 obsolete punctato ; el3'tris leviter striato-punctatis ; corpore infra 

 valde nitido, macxilis quatuor aureo-squamosis decorato. Long. 

 ^ lin. 



Hah. Parana. 



Rhombic, glossy copper-coloured ; rostrum slender, mode- 

 rately curved, finely and remotely punctured ; scrobes post- 

 median ; antennae ferruginous ; scape rather short j funicle 

 twice as long as the scape, first two joints equal in length ; 

 club short, subpyriform ; prothorax slightly convex above, 

 obliquely punctured, except at the apex, the base bisinuate, 

 scutellar lobe moderately broad ; scutellum transverse, the 

 apex mucronate ; elytra broader than the prothorax at the 

 base, shoulders rounded, finely striate-punctate, interspaces 

 impunctate, near the apex on each elytron a shortly elevated 

 callus ; body beneath glossy brown, with a large dense patch 

 of rich golden-yellow scales on each side of the metasternura 

 and another on the pectus, the metasternura with minute but 

 distinct scattered punctures ; legs rather stout, tibiaj short, 

 sulcate ; second joint of the tarsi as broad as the third. 



This species is nearly allied to C. lucens and C. cupratus^ 

 but these have the body beneath entirely glabrous, and have 

 more of a golden tint ; the former has the second joint of the 

 funicle half as long again as the first, the anterior coxas more 

 approximate, a coarser and closer punctuation on the meta- 

 sternura, &c. They belong to the DiastetJncs division, which 

 has for its type C. tumidus^ Eoh. 



Centrinus guttatus. 



C. ovatus, niger, albo-guttatus, capite prothoraceque antice aureo- 

 squamosis ; pedibus ferrugiueis, squamis oblongis separatim in- 



